Publications

Submitted

Distributed Quantum Information Processing: A Review of Recent Progress

J. Knörzer, X. Liu, B. F. Schiffer, and J. Tura

arXiv:2510.15630 (2025)

Detecting genuine multipartite entanglement in multi-qubit devices with restricted measurements

N. K. H. Li, X. Dai, M. H. Muñoz-Arias, K. Reuer, M. Huber, and N. Friis

arXiv:2504.21076 (2025)

Performance Characterization of a Multi-Module Quantum Processor with Static Inter-Chip Couplers

G. J. Norris, K. Dalton, D. C. Zanuz, A. Rommens, A. Flasby, M. B. Panah, F. Swiadek, C. Scarato, C. Hellings, J. Besse, and A. Wallraff

arXiv:2503.12603 (2025)

Experimentally Informed Decoding of Stabilizer Codes Based on Syndrome Correlations

A. Remm, N. Lacroix, L. Bödeker, E. Genois, C. Hellings, F. Swiadek, G. J. Norris, C. Eichler, A. Blais, M. Müller, S. Krinner, and A. Wallraff

arXiv:2502.17722 (2025)

Device-Independent Randomness Amplification

A. Kulikov, S. Storz, J. D. Schär, M. Sandfuchs, R. Wolf, F. Berterottière, C. Hellings, R. Renner, and A. Wallraff

arXiv:2412.17931 (2024)

Frequency Up-Conversion Schemes for Controlling Superconducting Qubits

J. Herrmann, C. Hellings, S. Lazăr, F. Pfäffli, F. Haupt, T. Thiele, D. C. Zanuz, G. J. Norris, F. Heer, C. Eichler, and A. Wallraff

arXiv:2210.02513 (2022)

In Print

Resource-Efficient Cross-Platform Verification with Modular Superconducting Devices

K. Dalton, J. Knörzer, F. Hoehne, Y. Song, A. Flasby, D. C. Zanuz, M. B. Panah, I. Besedin, J. Besse, and A. Wallraff

PRX Quantum (2025), open access: arXiv:2507.15302

Realizing Lattice Surgery on Two Distance-Three Repetition Codes with Superconducting Qubits

I. Besedin, M. Kerschbaum, J. Knoll, I. Hesner, L. Bödeker, L. Colmenarez, L. Hofele, N. Lacroix, C. Hellings, F. Swiadek, A. Flasby, M. B. Panah, D. C. Zanuz, M. Müller, and A. Wallraff

Nature Phys. (2025), open access: arXiv:2501.04612

2025

Calibrating magnetic flux control in superconducting circuits by compensating distortions on timescales from nanoseconds up to tens of microseconds

C. Hellings, N. Lacroix, A. Remm, R. Boell, J. Herrmann, S. Lazăr, S. Krinner, F. Swiadek, C. K. Andersen, C. Eichler, and A. Wallraff

Phys. Rev. Res. 7, 043142 (2025), open access: arXiv:2503.04610 (Online data)

Realizing a Continuous Set of Two-Qubit Gates Parameterized by an Idle Time

C. Scarato, K. Hanke, A. Remm, S. Lazăr, N. Lacroix, D. Colao Zanuz, A. Flasby, A. Wallraff, and C. Hellings

PRX Quantum 6, 040317 (2025), open access: arXiv:2503.11204

Constant-depth fan-out with real-time feedforward on a superconducting quantum processor

Y. Song, L. Beltran, I. Besedin, M. Kerschbaum, M. Pechal, F. Swiadek, C. Hellings, D. C. Zanuz, A. Flasby, J. Besse, and A. Wallraff

Phys. Rev. Appl. 24, 024068 (2025), open access: arXiv:2409.06989 (Online data)

Complete Self-Testing of a System of Remote Superconducting Qubits

S. Storz, A. Kulikov, J. D. Schär, V. Barizien, X. Valcarce, F. Berterottière, N. Sangouard, J. Bancal, and A. Wallraff

Phys. Rev. Lett. 135, 030801 (2025), open access: arXiv:2408.01299

Deterministic generation of two-dimensional multi-photon cluster states

J. O'Sullivan, K. Reuer, A. Grigorev, X. Dai, A. Hernandez-Anton, M. H. Munoz-Arias, C. Hellings, A. Flasby, D. Colao Zanuz, J. Besse, A. Blais, D. Malz, C. Eichler, and A. Wallraff

Nature Communications 16, 5505 (2025), open access: arXiv:2409.06623 (Online data)

Mitigating losses of superconducting qubits strongly coupled to defect modes

D. Colao Zanuz, Q. Ficheux, L. Michaud, A. Orekhov, K. Hanke, A. Flasby, M. Bahrami Panah, G. J. Norris, M. Kerschbaum, A. Remm, F. Swiadek, C. Hellings, S. Lazăr, C. Scarato, N. Lacroix, S. Krinner, C. Eichler, A. Wallraff, and J. Besse

Phys. Rev. Appl. 23, 044054 (2025), open access: arXiv:2407.18746

Fast Flux-Activated Leakage Reduction for Superconducting Quantum Circuits

N. Lacroix, L. Hofele, A. Remm, O. Benhayoune-Khadraoui, A. McDonald, R. Shillito, S. Lazăr, C. Hellings, F. Swiadek, D. Colao-Zanuz, A. Flasby, M. B. Panah, M. Kerschbaum, G. J. Norris, A. Blais, A. Wallraff, and S. Krinner

Phys. Rev. Lett. 134, 120601 (2025), open access: arXiv:2309.07060 (Online data)

2024

Enhancing Dispersive Readout of Superconducting Qubits through Dynamic Control of the Dispersive Shift: Experiment and Theory

F. Swiadek, R. Shillito, P. Magnard, A. Remm, C. Hellings, N. Lacroix, Q. Ficheux, D. C. Zanuz, G. J. Norris, A. Blais, S. Krinner, and A. Wallraff

PRX Quantum 5, 040326 (2024), open access: arXiv:2307.07765

Combining laser cooling and Zeeman deceleration for precision spectroscopy in supersonic beams

G. Clausen, L. Gabriel, J. A. Agner, H. Schmutz, T. Thiele, A. Wallraff, and F. Merkt

Phys. Rev. A 110, 042802 (2024)

Improved parameter targeting in 3D-integrated superconducting circuits through a polymer spacer process

G. J. Norris, L. Michaud, D. Pahl, M. Kerschbaum, C. Eichler, J. Besse, and A. Wallraff

EPJ Quantum Technol. 11, 5 (2024), open access: arXiv:2307.00046 (Online data)

2023

Realizing a deep reinforcement learning agent for real-time quantum feedback

K. Reuer, J. Landgraf, T. Fösel, J. O'Sullivan, L. Beltran, A. Akin, G. J. Norris, A. Remm, M. Kerschbaum, J. Besse, F. Marquardt, A. Wallraff, and C. Eichler

Nat. Commun. 14, 7138 (2023), open access: arXiv:2210.16715 (Online data)

Intermodulation Distortion in a Josephson Traveling-Wave Parametric Amplifier

A. Remm, S. Krinner, N. Lacroix, C. Hellings, F. Swiadek, G. J. Norris, C. Eichler, and A. Wallraff

Phys. Rev. Appl. 20, 034027 (2023), open access: arXiv:2210.04799

Calibration of Drive Nonlinearity for Arbitrary-Angle Single-Qubit Gates Using Error Amplification

S. Lazăr, Q. Ficheux, J. Herrmann, A. Remm, N. Lacroix, C. Hellings, F. Swiadek, D. C. Zanuz, G. J. Norris, M. B. Panah, A. Flasby, M. Kerschbaum, J. Besse, C. Eichler, and A. Wallraff

Phys. Rev. Appl. 20, 024036 (2023), open access: arXiv:2212.01077

Loophole-free Bell inequality violation with superconducting circuits

S. Storz, J. Schär, A. Kulikov, P. Magnard, P. Kurpiers, J. Lütolf, T. Walter, A. Copetudo, K. Reuer, A. Akin, J. Besse, M. Gabureac, G. J. Norris, A. Rosario, F. Martin, J. Martinez, W. Amaya, M. W. Mitchell, C. Abellan, J. Bancal, N. Sangouard, B. Royer, A. Blais, and A. Wallraff

Nature 617, 265-270 (2023)

2022

Controlling Atom-Photon Bound States in an Array of Josephson-Junction Resonators

M. Scigliuzzo, G. Calajò, F. Ciccarello, D. Perez Lozano, A. Bengtsson, P. Scarlino, A. Wallraff, D. Chang, P. Delsing, and S. Gasparinetti

Phys. Rev. X 12, 031036 (2022), open access: arXiv:2107.06852

Large-bandwidth Transduction Between an Optical Single Quantum Dot Molecule and a Superconducting Resonator

Y. Tsuchimoto, Z. Sun, E. Togan, S. Fält, W. Wegscheider, A. Wallraff, K. Ensslin, A. İmamoğlu, and M. Kroner

PRX Quantum 3, 030336 (2022)

Magnetic imaging of superconducting qubit devices with scanning SQUID-on-tip

E. Marchiori, L. Ceccarelli, N. Rossi, G. Romagnoli, J. Herrmann, J. Besse, S. Krinner, A. Wallraff, and M. Poggio

Applied Physics Letters 121, 052601 (2022)

Realizing quantum convolutional neural networks on a superconducting quantum processor to recognize quantum phases

J. Herrmann, S. M. Llima, A. Remm, P. Zapletal, N. A. McMahon, C. Scarato, F. Swiadek, C. K. Andersen, C. Hellings, S. Krinner, N. Lacroix, S. Lazăr, M. Kerschbaum, D. C. Zanuz, G. J. Norris, M. J. Hartmann, A. Wallraff, and C. Eichler

Nat. Commun. 13, 4144 (2022), open access: arXiv:2109.05909 (Online data)

In situ Tuning of the Electric-Dipole Strength of a Double-Dot Charge Qubit: Charge-Noise Protection and Ultrastrong Coupling

P. Scarlino, J. H. Ungerer, D. J. van Woerkom, M. Mancini, P. Stano, C. Müller, A. J. Landig, J. V. Koski, C. Reichl, W. Wegscheider, T. Ihn, K. Ensslin, and A. Wallraff

Phys. Rev. X 12, 031004 (2022)

Building blocks of a flip-chip integrated superconducting quantum processor

S. Kosen, H. Li, M. Rommel, D. Shiri, C. Warren, L. Grönberg, J. Salonen, T. Abad, J. Biznárová, M. Caputo, L. Chen, K. Grigoras, G. Johansson, A. F. Kockum, C. Križan, D. P. Lozano, G. J. Norris, A. Osman, J. Fernández-Pendás, A. Ronzani, A. F. Roudsari, S. Simbierowicz, G. Tancredi, A. Wallraff, C. Eichler, J. Govenius, and J. Bylander

Quantum Sci. Technol. 7, 035018 (2022), open access: arXiv:2112.02717

Realizing repeated quantum error correction in a distance-three surface code

S. Krinner, N. Lacroix, A. Remm, A. D. Paolo, E. Genois, C. Leroux, C. Hellings, S. Lazăr, F. Swiadek, J. Herrmann, G. J. Norris, C. K. Andersen, M. Müller, A. Blais, C. Eichler, and A. Wallraff

Nature 605, 669--674 (2022), open access: arXiv:2112.03708 (Online data)

Realization of a Universal Quantum Gate Set for Itinerant Microwave Photons

K. Reuer, J. Besse, L. Wernli, P. Magnard, P. Kurpiers, G. J. Norris, A. Wallraff, and C. Eichler

Phys. Rev. X 12, 011008 (2022), open access: arXiv:2106.03481 (Online data)

2021

Circuit quantum electrodynamics

A. Blais, A. L. Grimsmo, S. M. Girvin, and A. Wallraff

Rev. Mod. Phys. 93, 025005 (2021), open access: arXiv:2005.12667

Charge qubit in a triple quantum dot with tunable coherence

B. Kratochwil, J. V. Koski, A. J. Landig, P. Scarlino, J. C. Abadillo-Uriel, C. Reichl, S. N. Coppersmith, W. Wegscheider, M. Friesen, A. Wallraff, T. Ihn, and K. Ensslin

Phys. Rev. Research 3, 013171 (2021), open access: arXiv:2006.05883

2020

Microwave Quantum Link between Superconducting Circuits Housed in Spatially Separated Cryogenic Systems

P. Magnard, S. Storz, P. Kurpiers, J. Schär, F. Marxer, J. Lütolf, T. Walter, J. Besse, M. Gabureac, K. Reuer, A. Akin, B. Royer, A. Blais, and A. Wallraff

Phys. Rev. Lett. 125, 260502 (2020), open access: arXiv:2008.01642 (Online data)

Primary Thermometry of Propagating Microwaves in the Quantum Regime

M. Scigliuzzo, A. Bengtsson, J. Besse, A. Wallraff, P. Delsing, and S. Gasparinetti

Phys. Rev. X 10, 041054 (2020), open access: arXiv:2003.13522

Implementation of Conditional Phase Gates Based on Tunable ZZ Interactions

M. C. Collodo, J. Herrmann, N. Lacroix, C. K. Andersen, A. Remm, S. Lazăr, J. Besse, T. Walter, A. Wallraff, and C. Eichler

Phys. Rev. Lett. 125, 240502 (2020), open access: arXiv:2005.08863 (Online data)

Demonstration of an All-Microwave Controlled-Phase Gate between Far-Detuned Qubits

S. Krinner, P. Kurpiers, B. Royer, P. Magnard, I. Tsitsilin, J. Besse, A. Remm, A. Blais, and A. Wallraff

Phys. Rev. Appl. 14, 044039 (2020), open access: arXiv:2006.10639 (Online data)

Improving the Performance of Deep Quantum Optimization Algorithms with Continuous Gate Sets

N. Lacroix, C. Hellings, C. K. Andersen, A. Di Paolo, A. Remm, S. Lazăr, S. Krinner, G. J. Norris, M. Gabureac, J. Heinsoo, A. Blais, C. Eichler, and A. Wallraff

PRX Quantum 1, 020304 (2020), open access: arXiv:2005.05275 (Online data)

Realizing a Deterministic Source of Multipartite-Entangled Photonic Qubits

J. Besse, K. Reuer, M. C. Collodo, A. Wulff, L. Wernli, A. Copetudo, D. Malz, P. Magnard, A. Akin, M. Gabureac, G. J. Norris, J. I. Cirac, A. Wallraff, and C. Eichler

Nat. Commun. 11, 4877 (2020), open access: arXiv:2005.07060 (Online data)

Benchmarking Coherent Errors in Controlled-Phase Gates due to Spectator Qubits

S. Krinner, S. Lazăr, A. Remm, C. Andersen, N. Lacroix, G. Norris, C. Hellings, M. Gabureac, C. Eichler, and A. Wallraff

Phys. Rev. Appl. 14, 024042 (2020), open access: arXiv:2005.05914 (Online data)

Repeated Quantum Error Detection in a Surface Code

C. K. Andersen, A. Remm, S. Lazăr, S. Krinner, N. Lacroix, G. J. Norris, M. Gabureac, C. Eichler, and A. Wallraff

Nat. Phys. 16, 875--880 (2020), open access: arXiv:1912.09410

Strong photon coupling to the quadrupole moment of an electron in a solid-state qubit

J. Koski, A. Landig, M. Russ, J. Abadillo-Uriel, P. Scarlino, B. Kratochwil, C. Reichl, W. Wegscheider, G. Burkard, M. Friesen, S. Coppersmith, A. Wallraff, T. Ihn, and K. Ensslin

Nat. Phys. , (2020), open access: arXiv:1905.00846

Radiative cooling of a spin ensemble

B. Albanese, S. Probst, V. Ranjan, C. W. Zollitsch, M. Pechal, A. Wallraff, J. J. L. Morton, D. Vion, D. Esteve, E. Flurin, and P. Bertet

Nat. Phys. , (2020), open access: arXiv:1910.11092

Parity Detection of Propagating Microwave Fields

J. Besse, S. Gasparinetti, M. C. Collodo, T. Walter, A. Remm, J. Krause, C. Eichler, and A. Wallraff

Phys. Rev. X 10, 011046 (2020), open access: arXiv:1912.09896

2019

Single-shot Non-destructive Detection of Rydberg Atom Ensembles by Transmission Measurement of a Microwave Cavity

S. Garcia, M. Stammeier, J. Deiglmayr, F. Merkt, and A. Wallraff

Phys. Rev. Lett. 123, 193201 (2019), open access: arXiv:1901.05685

Virtual-photon-mediated spin-qubit-transmon coupling

A. Landig, J. Koski, P. Scarlino, C. Müller, J. Abadillo-Uriel, B. Kratochwil, C. Reichl, W. Wegscheider, S. Coppersmith, M. Friesen, A. Wallraff, T. Ihn, and K. Ensslin

Nat. Commun. 10, 5037 (2019), open access: arXiv:1903.04022

Quantum Communication with Time-Bin Encoded Microwave Photons

P. Kurpiers, M. Pechal, B. Royer, P. Magnard, T. Walter, J. Heinsoo, Y. Salathé, A. Akin, S. Storz, J. Besse, S. Gasparinetti, A. Blais, and A. Wallraff

Phys. Rev. Appl. 12, 044067 (2019), open access: arXiv:1811.07604

Two-photon resonance fluorescence of a ladder-type atomic system

S. Gasparinetti, J. Besse, M. Pechal, R. D. Buijs, C. Eichler, H. J. Carmichael, and A. Wallraff

Phys. Rev. A 100, 033802 (2019), open access: arXiv:1901.00414

Entanglement stabilization using ancilla-based parity detection and real-time feedback in superconducting circuits

C. K. Andersen, A. Remm, S. Lazăr, S. Krinner, J. Heinsoo, J. Besse, M. Gabureac, A. Wallraff, and C. Eichler

npj Quantum Information 5, 69 (2019), open access: arXiv:1902.06946

Coherent microwave-photon-mediated coupling between a semiconductor and a superconducting qubit

P. Scarlino, D. J. van Woerkom, U. C. Mendes, J. V. Koski, A. J. Landig, C. K. Andersen, S. Gasparinetti, C. Reichl, W. Wegscheider, K. Ensslin, T. Ihn, A. Blais, and A. Wallraff

Nat. Commun. 10, 3011 (2019), open access: arXiv:1806.10039 (Online data)

Microwave cavity detected spin blockade in a few electron double quantum dot

A. Landig, J. Koski, P. Scarlino, C. Reichl, W. Wegscheider, A. Wallraff, K. Ensslin, and T. Ihn

Phys. Rev. Lett. 122, 213601 (2019), open access: arXiv:1811.03907

Engineering cryogenic setups for 100-qubit scale superconducting circuit systems

S. Krinner, S. Storz, P. Kurpiers, P. Magnard, J. Heinsoo, R. Keller, J. Lütolf, C. Eichler, and A. Wallraff

EPJ Quantum Technology 6, 2 (2019), open access: arXiv:1806.07862

All-Microwave Control and Dispersive Readout of Gate-Defined Quantum Dot Qubits in Circuit Quantum Electrodynamics

P. Scarlino, D. J. van Woerkom, A. Stockklauser, J. V. Koski, M. C. Collodo, S. Gasparinetti, C. Reichl, W. Wegscheider, T. Ihn, K. Ensslin, and A. Wallraff

Phys. Rev. Lett. 122, 206802 (2019), open access: arXiv:1711.01906

Observation of the Crossover from Photon Ordering to Delocalization in Tunably Coupled Resonators

M. Collodo, A. Potočnik, S. Gasparinetti, J. Besse, M. Pechal, M. Sameti, M. Hartmann, A. Wallraff, and C. Eichler

Phys. Rev. Lett. 122, 183601 (2019), open access: arXiv:1808.00889

2018

Microwave photon-mediated interactions between semiconductor qubits

D. van Woerkom, P. Scarlino, J. Ungerer, C. Muller, J. Koski, A. Landig, C. Reichl, W. Wegscheider, T. Ihn, K. Ensslin, and A. Wallraff

Phys. Rev. X 8, 041018 (2018), open access: arXiv:1806.09902

Rapid High-fidelity Multiplexed Readout of Superconducting Qubits

J. Heinsoo, C. K. Andersen, A. Remm, S. Krinner, T. Walter, Y. Salathé, S. Gasparinetti, J. Besse, A. Potočnik, A. Wallraff, and C. Eichler

Phys. Rev. Appl. 10, 034040 (2018), open access: arXiv:1801.07904

The quantum technologies roadmap: a European community view

A. Acin, I. Bloch, H. Buhrman, T. Calarco, C. Eichler, J. Eisert, D. Esteve, N. Gisin, S. J. Glaser, F. Jelezko, S. Kuhr, M. Lewenstein, M. F. Riedel, P. O. Schmidt, R. Thew, A. Wallraff, I. Walmsley, and F. K. Wilhelm

New Journal of Physics 20, 080201 (2018), open access: arXiv:1712.03773

Fast and Unconditional All-Microwave Reset of a Superconducting Qubit

P. Magnard, P. Kurpiers, B. Royer, T. Walter, J. Besse, S. Gasparinetti, M. Pechal, J. Heinsoo, S. Storz, A. Blais, and A. Wallraff

Phys. Rev. Lett. 121, 060502 (2018), open access: arXiv:1801.07689

Applying electric and magnetic field bias in a 3D superconducting waveguide cavity with high quality factor

M. Stammeier, S. Garcia, and A. Wallraff

Quantum Science and Technology 3, 045007 (2018), open access: arXiv:1712.08631

Coherent spin-photon coupling using a resonant exchange qubit

A. Landig, J. Koski, P. Scarlino, U. Mendes, A. Blais, C. Reichl, W. Wegscheider, A. Wallraff, K. Ensslin, and T. Ihn

Nature 560, 179-184 (2018), open access: arXiv:1711.01932

Floquet Spectroscopy of a Strongly Driven Quantum Dot Charge Qubit with a Microwave Resonator

J. Koski, A. Landig, A. Pályi, P. Scarlino, C. Reichl, W. Wegscheider, G. Burkard, A. Wallraff, K. Ensslin, and T. Ihn

Phys. Rev. Lett. 121, 043603 (2018), open access: arXiv:1802.03810

Deterministic quantum state transfer and remote entanglement using microwave photons

P. Kurpiers, P. Magnard, T. Walter, B. Royer, M. Pechal, J. Heinsoo, Y. Salathé, A. Akin, S. Storz, J. Besse, S. Gasparinetti, A. Blais, and A. Wallraff

Nature 558, 264--267 (2018), open access: arXiv:1712.08593

Challenging local realism with human choices

The BIG Bell Test Collaboration

Nature 557, 212--216 (2018), open access: arXiv:1805.04431

Single-Shot Quantum Non-Demolition Detection of Individual Itinerant Microwave Photons

J. Besse, S. Gasparinetti, M. C. Collodo, T. Walter, P. Kurpiers, M. Pechal, C. Eichler, and A. Wallraff

Phys. Rev. X 8, 021003 (2018), open access: arXiv:1711.11569

Low-Latency Digital Signal Processing for Feedback and Feedforward in Quantum Computing and Communication

Y. Salathé, P. Kurpiers, T. Karg, C. Lang, C. K. Andersen, A. Akin, S. Krinner, C. Eichler, and A. Wallraff

Phys. Rev. Appl. 9, 034011 (2018), open access: arXiv:1709.01030

Studying light-harvesting models with superconducting circuits

A. Potočnik, A. Bargerbos, F. A. Y. N. Schröder, S. A. Khan, M. C. Collodo, S. Gasparinetti, Y. Salathé, C. Creatore, C. Eichler, H. E. Türeci, A. W. Chin, and A. Wallraff

Nat. Commun. 9, 904 (2018), open access: arXiv:1710.07466

Observation of topological Uhlmann phases with superconducting qubits

O. Viyuela, A. Rivas, S. Gasparinetti, A. Wallraff, S. Filipp, and M. A. Martin-Delgado

npj Quantum Information 4, 10 (2018), open access: arXiv:1607.08778

2017

Realization of a Quantum Random Generator Certified with the Kochen-Specker Theorem

A. Kulikov, M. Jerger, A. Potocnik, A. Wallraff, and A. Fedorov

Phys. Rev. Lett. 119, 240501 (2017), open access: arXiv:1709.03687

Correlations and entanglement of microwave photons emitted in a cascade decay

S. Gasparinetti, M. Pechal, J. Besse, M. Mondal, C. Eichler, and A. Wallraff

Phys. Rev. Lett. 119, 140504 (2017), open access: arXiv:1705.05272

Rapid High-Fidelity Single-Shot Dispersive Readout of Superconducting Qubits

T. Walter, P. Kurpiers, S. Gasparinetti, P. Magnard, A. Potočnik, Y. Salathé, M. Pechal, M. Mondal, M. Oppliger, C. Eichler, and A. Wallraff

Phys. Rev. Appl. 7, 054020 (2017), open access: arXiv:1701.06933

Measuring the dispersive frequency shift of a rectangular microwave cavity induced by an ensemble of Rydberg atoms

M. Stammeier, S. Garcia, T. Thiele, J. Deiglmayr, J. A. Agner, H. Schmutz, F. Merkt, and A. Wallraff

Phys. Rev. A 95, 053855 (2017), open access: arXiv:1701.01426

Measuring the polarization of electromagnetic fields using Rabi-rate measurements with spatial resolution: experiment and theory

J. Koepsell, T. Thiele, J. Deiglmayr, A. Wallraff, and F. Merkt

Phys. Rev. A 95, 053860 (2017), open access: arXiv:1702.04481

Energy-dependent path of dissipation in nanomechanical resonators

J. Guettinger, A. Noury, P. Weber, A. Eriksson, C. Lagoin, J. Moser, C. Eichler, A. Wallraff, A. Isacsson, and A. Bachtold

Nature Nanotechnology , (2017), open access: arXiv:1612.04214

Characterizing the attenuation of coaxial and rectangular microwave-frequency waveguides at cryogenic temperatures

P. Kurpiers, T. Walter, P. Magnard, Y. Salathe, and A. Wallraff

EPJ Quantum Technology 4, 8 (2017), open access: arXiv:1502.06778

A Superconducting Quantum Simulator for Topological Order and the Toric Code

M. Sameti, A. Potocnik, D. E. Browne, A. Wallraff, and M. J. Hartmann

Phys. Rev. A 95, 042330 (2017), open access: arXiv:1608.04565

Strong Coupling Cavity QED with Gate-Defined Double Quantum Dots Enabled by a High Impedance Resonator

A. Stockklauser, P. Scarlino, J. Koski, S. Gasparinetti, C. Andersen, C. Reichl, W. Wegscheider, T. Ihn, K. Ensslin, and A. Wallraff

Phys. Rev. X 7, 011030 (2017), open access: arXiv:1701.03433

Observation of the photon-blockade breakdown phase transition

J. M. Fink, A. Dombi, A. Vukics, A. Wallraff, and P. Domokos

Phys. Rev. X 7, 011012 (2017), open access: arXiv:1607.04892

2016

Contextuality without nonlocality in a superconducting quantum system

M. Jerger, Y. Reshitnyk, M. Oppliger, A. Poto´cnik, M. Mondal, A. Wallraff, K. Goodenough, S. Wehner, K. Juliusson, N. K. Langford, and A. Fedorov

Nat. Commun. 7, 12930 (2016), open access: arXiv:1602.00440

Superconducting Switch for Fast On-Chip Routing of Quantum Microwave Fields

M. Pechal, J. Besse, M. Mondal, M. Oppliger, S. Gasparinetti, and A. Wallraff

Phys. Rev. Appl. 6, 024009 (2016), open access: arXiv:1606.01031

Measurement of a vacuum-induced geometric phase

S. Gasparinetti, S. Berger, A. A. Abdumalikov, M. Pechal, S. Filipp, and A. J. Wallraff

Sci. Adv. 2, e1501732 (2016), open access: arXiv:1605.06454

2015

Imaging electric fields in the vicinity of cryogenic surfaces using Rydberg atoms

T. Thiele, J. Deiglmayr, M. Stammeier, J. Agner, H. Schmutz, F. Merkt, and A. Wallraff

Phys. Rev. A 92, 063425 (2015), open access: arXiv:1509.05450

Exploring Interacting Quantum Many-Body Systems by Experimentally Creating Continuous Matrix Product States in Superconducting Circuits

C. Eichler, J. Mlynek, J. Butscher, P. Kurpiers, K. Hammerer, T. J. Osborne, and A. Wallraff

Phys. Rev. X 5, 041044 (2015), open access: arXiv:1508.06471

Shot Noise of a Quantum Dot Measured with Gigahertz Impedance Matching

T. Hasler, M. Jung, V. Ranjan, G. Puebla-Hellmann, A. Wallraff, and C. Schönenberger

Phys. Rev. Appl. 4, 054002 (2015), open access: arXiv:1507.04884

Measurement of geometric dephasing using a superconducting qubit

S. Berger, M. Pechal, P. Kurpiers, A. A. Abdumalikov, C. Eichler, J. A. Mlynek, A. Shnirman, Y. Gefen, A. Wallraff, and S. Filipp

Nat. Commun. 6, 8757 (2015), open access: arXiv:1510.04986

Microwave Emission from Hybridized States in a Semiconductor Charge Qubit

A. Stockklauser, V. F. Maisi, J. Basset, K. Cujia, C. Reichl, W. Wegscheider, T. Ihn, A. Wallraff, and K. Ensslin

Phys. Rev. Lett. 115, 046802 (2015), open access: arXiv:1504.05497

Digital Quantum Simulation of Spin Models with Circuit Quantum Electrodynamics

Y. Salathé, M. Mondal, M. Oppliger, J. Heinsoo, P. Kurpiers, A. Potočnik, A. Mezzacapo, U. Las Heras, L. Lamata, E. Solano, S. Filipp, and A. Wallraff

Phys. Rev. X 5, 021027 (2015), open access: arXiv:1502.06778

Clean carbon nanotubes coupled to superconducting impedance-matching circuits

V. Ranjan, G. Puebla-Hellmann, M. Jung, T. Hasler, A. Nunnenkamp, M. Muoth, C. Hierold, A. Wallraff, and C. Schönenberger

Nat. Commun. 6, 7165 (2015), open access: arXiv:1505.04681

Microwave-induced amplitude- and phase-tunable qubit-resonator coupling in circuit quantum electrodynamics

S. Zeytinoğlu, M. Pechal, S. Berger, A. A. Abdumalikov Jr., A. Wallraff, and S. Filipp

Phys. Rev. A 91, 043846 (2015), open access: arXiv:1502.03692

2014

The role of titanium in electromigrated tunnel junctions

M. Frimmer, G. Puebla-Hellmann, A. Wallraff, and L. Novotny

Applied Physics Letters 105, 221118 (2014), open access: arXiv:1409.7689

Observation of Dicke superradiance for two artificial atoms in a cavity with high decay rate

J. Mlynek, A. Abdumalikov, C. Eichler, and A. Wallraff

Nat. Commun. 5, 5186 (2014), open access: arXiv:1412.2392

Microwave-Controlled Generation of Shaped Single Photons in Circuit Quantum Electrodynamics

M. Pechal, L. Huthmacher, C. Eichler, S. Zeytinoğlu, A. A. Abdumalikov Jr., S. Berger, A. Wallraff, and S. Filipp

Phys. Rev. X 4, 041010 (2014), open access: arXiv:1308.4094

Quantum-Limited Amplification and Entanglement in Coupled Nonlinear Resonators

C. Eichler, Y. Salathe, J. Mlynek, S. Schmidt, and A. Wallraff

Phys. Rev. Lett. 113, 110502 (2014), open access: arXiv:1404.4643

Evaluating charge noise acting on semiconductor quantum dots in the circuit quantum electrodynamics architecture

J. Basset, A. Stockklauser, D. Jarausch, T. Frey, C. Reichl, W. Wegscheider, A. Wallraff, K. Ensslin, and T. Ihn

Applied Physics Letters 105, 063105 (2014), open access: arXiv:1405.3085

Tomography schemes for characterizing itinerant microwave photon fields

C. Eichler, D. Bozyigit, C. Lang, L. Steffen, J. Fink, and A. Wallraff

, Oxford Univ. Press, ISBN 978-0-19-968118-1 (2014)

Many-Body Interactions with Tunable-Coupling Transmon Qubits

A. Mezzacapo, L. Lamata, S. Filipp, and E. Solano

Phys. Rev. Lett. 113, 050501 (2014), open access: arXiv:1403.3652

Manipulating Rydberg atoms close to surfaces at cryogenic temperatures

T. Thiele, S. Filipp, J. A. Agner, H. Schmutz, J. Deiglmayr, M. Stammeier, P. Allmendinger, F. Merkt, and A. Wallraff

Phys. Rev. A 90, 013414 (2014), open access: arXiv:1402.7217

Digital Quantum Simulation of Spin Systems in Superconducting Circuits

U. Las Heras, A. Mezzacapo, L. Lamata, S. Filipp, A. Wallraff, and E. Solano

Phys. Rev. Lett. 112, 200501 (2014), open access: arXiv:1311.7626

Reversing Quantum Trajectories with Analog Feedback

G. de Lange, D. Riste, M. J. Tiggelman, C. Eichler, L. Tornberg, G. Johansson, A. Wallraff, R. N. Schouten, and L. DiCarlo

Phys. Rev. Lett. 112, 080501-- (2014), open access: arXiv:1311.5472

Controlling the dynamic range of a Josephson parametric amplifier

C. Eichler and A. Wallraff

EPJ Quantum Technology 1, 2 (2014), open access: arXiv:1305.6583

Electrolyte gate dependent high-frequency measurement of graphene field-effect transistor for sensing applications

W. Fu, M. El Abbassi, T. Hasler, M. Jung, M. Steinacher, M. Calame, C. Schönenberger, G. Puebla-Hellmann, S. Hellmüller, T. Ihn, and A. Wallraff

Applied Physics Letters 104, 013102 (2014), open access: arXiv:1401.0381

2013

Photon-Mediated Interactions Between Distant Artificial Atoms

A. van Loo, A. Fedorov, K. Lalumière, B. Sanders, A. Blais, and A. Wallraff

Science 342, 1494-1496 (2013), open access: arXiv:1407.6747

Comment on 'Vacuum Rabi Splitting in a Semiconductor Circuit QED System'

A. Wallraff, A. Stockklauser, T. Ihn, J. R. Petta, and A. Blais

Phys. Rev. Lett. 111, 249701 (2013), open access: arXiv:1304.3697

Signatures of Hong-Ou-Mandel Interference at Microwave Frequencies

M. J. Woolley, C. Lang, C. Eichler, A. Wallraff, and A. Blais

New J. Phys. 15, 105025--19 (2013), open access: arXiv:1304.6068

Input-output theory for waveguide QED with an ensemble of inhomogeneous atoms

K. Lalumière, B. C. Sanders, A. F. van Loo, A. Fedorov, A. Wallraff, and A. Blais

Phys. Rev. A 88, 043806 (2013), open access: arXiv:1305.7135

Single-electron double quantum dot dipole-coupled to a single photonic mode

J. Basset, D. Jarausch, A. Stockklauser, T. Frey, C. Reichl, W. Wegscheider, T. M. Ihn, K. Ensslin, and A. Wallraff

Phys. Rev. B 88, 125312 (2013), open access: arXiv:1304.5141

Deterministic quantum teleportation with feed-forward in a solid state system

L. Steffen, Y. Salathe, M. Oppliger, P. Kurpiers, M. Baur, C. Lang, C. Eichler, G. Puebla-Hellmann, A. Fedorov, and A. Wallraff

Nature 500, 319-322 (2013), open access: arXiv:1302.5621

Exploring the effect of noise on the Berry phase

S. Berger, M. Pechal, A. Abdumalikov Jr., C. Eichler, L. Steffen, A. Fedorov, A. Wallraff, and S. Filipp

Phys. Rev. A 87, 060303(R) (2013), open access: arXiv:1302.3305

Collective Suppression of Linewidths in Circuit QED

F. Nissen, J. M. Fink, J. A. Mlynek, A. Wallraff, and J. Keeling

Phys. Rev. Lett. 110, 203602 (2013), open access: arXiv:1302.0665

Correlations, indistinguishability and entanglement in Hong-Ou-Mandel experiments at microwave frequencies

C. Lang, C. Eichler, L. Steffen, J. M. Fink, M. J. Woolley, A. Blais, and A. Wallraff

Nat. Phys. 9, 345--348 (2013), open access: arXiv:1301.4458

Experimental Realization of Non-Abelian Non-Adiabatic Geometric Gates

A. Abdumalikov, J. M. Fink, K. Juliusson, M. Pechal, S. Berger, A. Wallraff, and S. Filipp

Nature 496, 482 (2013), open access: arXiv:1304.5186

2012

Observation of Entanglement between Itinerant Microwave Photons and a Superconducting Qubit

C. Eichler, C. Lang, J. M. Fink, J. Govenius, S. Filipp, and A. Wallraff

Phys. Rev. Lett. 109, 240501--5 (2012), open access: arXiv:1209.0441

Demonstrating W-type entanglement of Dicke states in resonant cavity quantum electrodynamics

J. A. Mlynek, A. A. Abdumalikov, J. M. Fink, L. Steffen, M. Baur, C. Lang, A. F. van Loo, and A. Wallraff

Phys. Rev. A 86, 053838 (2012), open access: arXiv:1202.5191

Characterizing quantum microwave radiation and its entanglement with superconducting qubits using linear detectors

C. Eichler, D. Bozyigit, and A. Wallraff

Phys. Rev. A 86, 032106 (2012), open access: arXiv:1206.3405v2

Quantum dot admittance probed at microwave frequencies with an on-chip resonator

T. Frey, P. J. Leek, M. Beck, J. Faist, A. Wallraff, K. Ensslin, T. Ihn, and M. Büttiker

Phys. Rev. B 86, 115303 (2012), open access: arXiv:1207.0945v1

Realization of gigahertz-frequency impedance matching circuits for nano-scale devices

G. Puebla-Hellmann and A. Wallraff

Appl. Phys. Lett. 101, 053108--4 (2012), open access: arXiv:1207.4403

Optimization of sample chip design for stub-matched radio-frequency reflectometry measurements

S. Hellmüller, M. Pikulski, T. Müller, B. Küng, G. Puebla-Hellmann, A. Wallraff, M. Beck, K. Ensslin, and T. Ihn

Appl. Phys. Lett. 101, 042112 (2012), open access: arXiv:1206.1785v1

Experimental Monte Carlo Quantum Process Certification

L. Steffen, M. da Silva, A. Fedorov, M. Baur, and A. Wallraff

Phys. Rev. Lett. 108, 260506 (2012), open access: arXiv:1202.5196

Geometric phases in superconducting qubits beyond the two-level-approximation

S. Berger, M. Pechal, S. Pugnetti, A. Abdumalikov Jr., L. Steffen, A. Fedorov, A. Wallraff, and S. Filipp

Phys. Rev. B 85, 220502(R) (2012), open access: arXiv:1204.1278

Geometric Phase and Nonadiabatic Effects in an Electronic Harmonic Oscillator

M. Pechal, S. Berger, J. A. Abdumalikov, J. Fink, J. Mlynek, L. Steffen, A. Wallraff, and S. Filipp

Phys. Rev. Lett. 108, 170401 (2012), open access: arXiv:1109.1157

Quantum-control approach to realizing a Toffoli gate in circuit QED

V. M. Stojanovi´c, A. Fedorov, A. Wallraff, and C. Bruder

Phys. Rev. B 85, 054504 (2012), open access: arXiv:1108.3442

Driving Rydberg-Rydberg Transitions from a Coplanar Microwave Waveguide

S. D. Hogan, J. A. Agner, F. Merkt, T. Thiele, S. Filipp, and A. Wallraff

Phys. Rev. Lett. 108, 063004 (2012), open access: arXiv:1110.1256

Dipole coupling of a double quantum dot to a microwave resonator

T. Frey, P. J. Leek, M. Beck, A. Blais, T. Ihn, K. Ensslin, and A. Wallraff

Phys. Rev. Lett. 108, 046807 (2012), open access: arXiv:1108.5378

Benchmarking a Quantum Teleportation Protocol in Superconducting Circuits Using Tomography and an Entanglement Witness

M. Baur, A. Fedorov, L. Steffen, S. Filipp, M. P. da Silva, and A. Wallraff

Phys. Rev. Lett. 108, 040502 (2012), open access: arXiv:1107.4774

Implementation of a Toffoli gate with superconducting circuits

A. Fedorov, L. Steffen, M. Baur, M. P. da Silva, and A. Wallraff

Nature 481, 170--172 (2012), open access: arXiv:1108.3966

2011

Preparation of subradiant states using local qubit control in circuit QED

S. Filipp, A. F. van Loo, M. Baur, L. Steffen, and A. Wallraff

Phys. Rev. A 84, 061805 (2011), open access: arXiv:1107.2078

Observation of Two-Mode Squeezing in the Microwave Frequency Domain

C. Eichler, D. Bozyigit, C. Lang, M. Baur, L. Steffen, J. M. Fink, S. Filipp, and A. Wallraff

Phys. Rev. Lett. 107, 113601 (2011), open access: arXiv:1101.2136

Characterization of a microwave frequency resonator via a nearby quantum dot

T. Frey, P. J. Leek, M. Beck, K. Ensslin, A. Wallraff, and T. Ihn

Appl. Phys. Lett. 98, 262105 (2011), open access: arXiv:1104.3535

Multimode mediated qubit-qubit coupling and dark-state symmetries in circuit quantum electrodynamics

S. Filipp, M. Göppl, J. M. Fink, M. Baur, R. Bianchetti, L. Steffen, and A. Wallraff

Phys. Rev. A 83, 063827 (2011), open access: arXiv:1011.3732

Observation of Resonant Photon Blockade at Microwave Frequencies Using Correlation Function Measurements

C. Lang, D. Bozyigit, C. Eichler, L. Steffen, J. Fink, A. Abdumalikov Jr., M. Baur, S. Filipp, M. da Silva, A. Blais, and A. Wallraff

Phys. Rev. Lett. 106, 243601--4 (2011), open access: arXiv:1102.0461

Experimental State Tomography of Itinerant Single Microwave Photons

C. Eichler, D. Bozyigit, C. Lang, L. Steffen, J. Fink, and A. Wallraff

Phys. Rev. Lett. 106, 220503--4 (2011), open access: arXiv:1011.6668

Correlation measurements of individual microwave photons emitted from a symmetric cavity

D. Bozyigit, C. Lang, L. Steffen, J. M. Fink, C. Eichler, M. Baur, R. Bianchetti, P. J. Leek, S. Filipp, A. Wallraff, M. P. da Silva, and A. Blais

J. Phys.: Conf. Ser. 264, 012024--8 (2011)

Fabrication and heating rate study of microscopic surface electrode ion traps

N. Daniilidis, S. Narayanan, S. A. Möller, R. Clark, T. E. Lee, P. J. Leek, A. Wallraff, S. Schulz, F. Schmidt-Kaler, and H. Häffner

New J. Phys. 13, 013032 (2011), open access: arXiv:1009.2834

Antibunching of microwave-frequency photons observed in correlation measurements using linear detectors

D. Bozyigit, C. Lang, L. Steffen, J. M. Fink, C. Eichler, M. Baur, R. Bianchetti, P. J. Leek, S. Filipp, M. P. da Silva, A. Blais, and A. Wallraff

Nat. Phys. 7, 154--158 (2011), open access: arXiv:1002.3738

2010

Control and Tomography of a Three Level Superconducting Artificial Atom

R. Bianchetti, S. Filipp, M. Baur, J. M. Fink, C. Lang, L. Steffen, M. Boissonneault, A. Blais, and A. Wallraff

Phys. Rev. Lett. 105, 223601 (2010), open access: arXiv:1004.5504

Quantum-To-Classical Transition in Cavity Quantum Electrodynamics

J. M. Fink, L. Steffen, P. Studer, L. S. Bishop, M. Baur, R. Bianchetti, D. Bozyigit, C. Lang, S. Filipp, P. J. Leek, and A. Wallraff

Phys. Rev. Lett. 105, 163601 (2010), open access: arXiv:1003.1161

Schemes for the observation of photon correlation functions in circuit QED with linear detectors

M. P. da Silva, D. Bozyigit, A. Wallraff, and A. Blais

Phys. Rev. A 82, 043804 (2010), open access: arXiv:1004.3987

Cavity Quantum Electrodynamics with Separate Photon Storage and Qubit Readout Modes

P. Leek, M. Baur, J. Fink, R. Bianchetti, L. Steffen, S. Filipp, and A. Wallraff

Phys. Rev. Lett. 104, 100504 (2010), open access: arXiv:0911.4951

2009

Thermal Excitation of Multi-Photon Dressed States in Circuit Quantum Electrodynamics

J. Fink, M. Baur, R. Bianchetti, S. Filipp, M. Göppl, P. Leek, L. Steffen, A. Blais, and A. Wallraff

Phys. Scr. T137, 014013 (2009), open access: arXiv:0911.3797

Dynamics of dispersive single-qubit readout in circuit quantum electrodynamics

R. Bianchetti, S. Filipp, M. Baur, J. Fink, M. Göppl, P. Leek, L. Steffen, A. Blais, and A. Wallraff

Phys. Rev. A 80, 043840--7 (2009), open access: arXiv:0907.2549

Dressed Collective Qubit States and the Tavis-Cummings Model in Circuit QED

J. M. Fink, R. Bianchetti, M. Baur, M. Göppl, L. Steffen, S. Filipp, P. J. Leek, A. Blais, and A. Wallraff

Phys. Rev. Lett. 103, 083601--4 (2009), open access: arXiv:0812.2651

Measurement of Autler-Townes and Mollow Transitions in a Strongly Driven Superconducting Qubit

M. Baur, S. Filipp, R. Bianchetti, J. M. Fink, M. Göppl, L. Steffen, P. J. Leek, A. Blais, and A. Wallraff

Phys. Rev. Lett. 102, 243602 (2009), open access: arXiv:0812.4384

Using sideband transitions for two-qubit operations in superconducting circuits

P. Leek, S. Filipp, P. Maurer, M. Baur, R. Bianchetti, J. Fink, M. Göppl, L. Steffen, and A. Wallraff

Phys. Rev. B 79, 180511 (2009), open access: arXiv:0812.2678

Two-Qubit State Tomography Using a Joint Dispersive Readout

S. Filipp, P. Maurer, P. Leek, M. Baur, R. Bianchetti, J. Fink, M. Göppl, L. Steffen, J. Gambetta, A. Blais, and A. Wallraff

Phys. Rev. Lett. 102, 200402 (2009), open access: arXiv:0812.2485

2008

Quantenmechanik mit Schaltkreisen: Photonen und Qubits auf einem supraleitenden Mikrochip

A. Wallraff

Physik Journal 7, 39-45 (2008)

Resolving Vacuum Fluctuations in an Electrical Circuit by Measuring the Lamb Shift

A. Fragner, M. Göppl, J. M. Fink, M. Baur, R. Bianchetti, P. J. Leek, A. Blais, and A. Wallraff

Science 322, 1357-1360 (2008)

Small steps that will lead to Quantum leaps

T. Calarco, P. Grangier, A. Wallraff, P. Zoller, and D. Binosi

eStrategies Projects 7, 70 (2008)

Coplanar Waveguide Resonators for Circuit Quantum Electrodynamics

M. Göppl, A. Fragner, M. Baur, R. Bianchetti, S. Filipp, J. M. Fink, P. J. Leek, G. Puebla, L. Steffen, and A. Wallraff

J. Appl. Phys. 104, 113904 (2008), open access: arXiv:0807.4094

Climbing the Jaynes-Cummings ladder and observing its nonlinearity in a cavity QED system

J. M. Fink, M. Göppl, M. Baur, R. Bianchetti, P. J. Leek, A. Blais, and A. Wallraff

Nature 454, 315--318 (2008), open access: arXiv:0902.1827

Commentary: Quantum leaps in small steps

T. Calarco, P. Grangier, A. Wallraff, and P. Zoller

Nat. Phys. 4, 2--3 (2008)

2007

Observation of Berry's Phase in a Solid-State Qubit

P. J. Leek, J. M. Fink, A. Blais, R. Bianchetti, M. Göppl, J. M. Gambetta, D. I. Schuster, L. Frunzio, R. J. Schoelkopf, and A. Wallraff

Science 318, 1889 (2007)

Coupling superconducting qubits via a cavity bus

J. Majer, J. M. Chow, J. M. Gambetta, J. Koch, B. R. Johnson, J. A. Schreier, L. Frunzio, D. I. Schuster, A. A. Houck, A. Wallraff, A. Blais, M. H. Devoret, S. M. Girvin, and R. J. Schoelkopf

Nature 449, 443--447 (2007), open access: arXiv:0709.2135v1

Sideband Transitions and Two-Tone Spectroscopy of a Superconducting Qubit Strongly Coupled to an On-Chip Cavity

A. Wallraff, D. Schuster, A. Blais, J. Gambetta, J. Schreier, L. Frunzio, M. Devoret, S. Girvin, and R. Schoelkopf

Phys. Rev. Lett. 99, 050501 (2007)

Quantum-information processing with circuit quantum electrodynamics

A. Blais, J. Gambetta, A. Wallraff, D. I. Schuster, S. M. Girvin, M. H. Devoret, and R. J. Schoelkopf

Phys. Rev. A 75, 032329--21 (2007)

2 Dispersive microwave bifurcation of a superconducting resonator cavity incorporating a Josephson junction

E. Boaknin, V. Manucharyan, S. Fissette, M. Metcalfe, L. Frunzio, R. Vijay, I. Siddiqi, A. Wallraff, R. Schoelkopf, and M. Devoret

arXiv:cond-mat/0702445 , (2007)

Resolving photon number states in a superconducting circuit

D. I. Schuster, A. A. Houck, J. A. Schreier, A. Wallraff, J. M. Gambetta, A. Blais, L. Frunzio, J. Majer, B. Johnson, M. H. Devoret, S. M. Girvin, and R. J. Schoelkopf

Nature 445, 515--518 (2007)

2006

Qubit-photon interactions in a cavity: Measurement-induced dephasing and number splitting

J. Gambetta, A. Blais, D. I. Schuster, A. Wallraff, L. Frunzio, J. Majer, M. H. Devoret, S. M. Girvin, and R. J. Schoelkopf

Phys. Rev. A 74, 042318 (2006)

Energy Level Spectroscopy of a Bound Vortex-Antivortex Pair

A. Kemp, M. V. Fistul, A. Wallraff, Y. Koval, A. Lukashenko, B. A. Malomed, and A. V. Ustinov

Quantum Computation in Solid State Systems , ISBN 0-387-26332-2 (2006)

2005

Approaching Unit Visibility for Control of a Superconducting Qubit with Dispersive Readout

A. Wallraff, D. Schuster, A. Blais, L. Frunzio, J. Majer, M. Devoret, S. Girvin, and R. Schoelkopf

Phys. Rev. Lett. 95, 060501 (2005)

Fabrication and characterization of superconducting circuit QED devices for quantum computation

L. Frunzio, A. Wallraff, D. Schuster, J. Majer, and R. Schoelkopf

IEEE T. Appl. Supercon. 15, 860--863 (2005)

Backaction effects of a SSET measuring a qubit spectroscopy and ground State measurement

B. Turek, J. Majer, A. Clerk, S. Girvin, A. Wallraff, K. Bladh, D. Gunnarsson, T. Duty, P. Delsing, and R. Schoelkopf

IEEE T. Appl. Supercon. 15, 880 - 883 (2005)

ac Stark shift and dephasing of a superconducting qubit strongly coupled to a cavity field

D. I. Schuster, A. Wallraff, A. Blais, L. Frunzio, R. Huang, J. Majer, S. M. Girvin, and R. J. Schoelkopf

Phys. Rev. Lett. 94, 123602 (2005)

Quantum Dynamics of Vortices and Vortex Qubits

A. Wallraff, A. Kemp, and A. V. Ustinov

Quantum Information Processing, 2nd, Revised and Enlarged Edition , Beth, Leuchs (Eds.), ISBN 3-527-40541-0, Wiley-VCH, Berlin (2005)

2004

Superconducting Qubits: A Short Review

M. Devoret, A. Wallraff, and J. Martinis

arXiv:cond-mat/0411174 , (2004)

Course 16: Prospects for strong cavity quantum electrodynamics with superconducting circuits

S. M. Girvin, R. Huang, A. Blais, A. Wallraff, and R. J. Schoelkopf

79, 591 - 608 (2004), open access: arXiv:0310670

Strong coupling of a single photon to a superconducting qubit using circuit quantum electrodynamics

A. Wallraff, D. Schuster, A. Blais, L. Frunzio, R. Huang, J. Majer, S. Kumar, S. Girvin, and R. Schoelkopf

Nature 431, 162--167 (2004), open access: arXiv:0407325

Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box

A. Wallraff, D. Schuster, A. Blais, L. Frunzio, R. Huang, J. Majer, S. Kumar, S. Girvin, and R. Schoelkopf

arXiv:cond-mat/0407325, extended version of Nature (London) 431, 162 (2004)

Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation

A. Blais, R. Huang, A. Wallraff, S. M. Girvin, and R. J. Schoelkopf

Phys. Rev. A 69, 062320 (2004)

2003

Quantum Dissociation of a Vortex-Antivortex Pair in a Long Josephson Junction

M. V. Fistul, A. Wallraff, Y. Koval, A. Lukashenko, B. A. Malomed, and A. V. Ustinov

Phys. Rev. Lett. 91, 257004 (2003), open access: arXiv:0307705

Quantum Dynamics of a Single Vortex

A. Wallraff, A. Lukashenko, J. Lisenfeld, A. Kemp, M. Fistul, Y. Koval, and A. Ustinov

Nature 425, 155 (2003)

Quantum escape of the phase in a strongly driven Josephson junction

M. V. Fistul, A. Wallraff, and A. V. Ustinov

Phys. Rev. B 68, 060504(R) (2003), open access: arXiv:0307668

Switching current measurements of large area Josephson tunnel junctions

A. Wallraff, A. Lukashenko, C. Coqui, A. Kemp, T. Duty, and A. Ustinov

Rev. Sci. Instrum. 74, 3740 (2003)

Multi-photon transitions between energy levels in a current-biased Josephson tunnel junction

A. Wallraff, T. Duty, A. Lukashenko, and A. Ustinov

Phys. Rev. Lett. 90, 37003 (2003)

2002

Josephson Vortex Qubit: Design, Preparation and Read-Out

A. Kemp, A. Wallraff, and A. Ustinov

physica status solidi (b) 233, 472--481 (2002)

Flüsternde Flussquanten: Josephson-Effekt

A. Wallraff and A. V. Ustinov

Physik in unserer Zeit 33, 184--190 (2002)

Testing a state preparation and read-out protocol for the vortex qubit

A. Kemp, A. Wallraff, and A. Ustinov

Physica C: Superconductivity 368, 324 - 327 (2002)

2001

Magnetic field penetration in a long Josephson junction imbedded in a wide stripline

A. Franz, A. Wallraff, and A. V. Ustinov

J. Appl. Phys. 89, 471-476 (2001)

Fluxon dynamics in annular Josephson junctions: From relativistic strings to quantum particles (PhD thesis)

A. Wallraff

1, Lehrstuhl f\"ur Mikrocharakterisierung Universit\"at Erlangen-N\"urnberg, ISBN 3-932392-29-9 (2001)

2000

Observation of whispering gallery resonances in annular Josephson junctions

A. Wallraff, A. Franz, A. Ustinov, V. Kurin, I. Shereshevsky, and N. Vdovicheva

Physica B 284-288, 575-576 (2000)

Measurements of critical-current diffraction patterns in annular Josephson junctions

A. Franz, A. Wallraff, and A. V. Ustinov

Phys. Rev. B 62, 119--122 (2000)

Escape of a Josephson vortex trapped in an annular Josephson junction

M. Fistul, M. Castellano, M. Cirillo, G. Torrioli, A. Wallraff, and A. Ustinov

Physica B: Condensed Matter 284--288, Part 1, 585 - 586 (2000)

Cherenkov Radiation from Fluxon in a Stack of Coupled Long Josephson Junctions

E. Goldobin, A. Wallraff, and A. V. Ustinov

J. Low Temp. Phys. 119, 589-614 (2000)

Annular long Josephson junctions in a magnetic field: Engineering and probing the fluxon potential

A. Wallraff, Y. Koval, M. Levitchev, M. V. Fistul, and A. V. Ustinov

J. Low Temp. Phys. 118, 543-553 (2000)

Whispering vortices

A. Wallraff, A. Ustinov, V. Kurin, I. Shereshevsky, and N. Vdovicheva

Phys. Rev. Lett. 84, 151 (2000)

1999

Narrow long Josephson junctions

Y. Koval, A. Wallraff, M. Fistul, N. Thyssen, H. Kohlstedt, and A. Ustinov

IEEE T. Appl. Supercon. 9, 3957 -3961 (1999)

Cherenkov radiation from Josephson fluxons

A. Ustinov, E. Goldobin, G. Hechtfischer, N. Thyssen, A. Wallraff, R. Kleiner, and P. Müller

38, 521-531 (1999)

1998

Cherenkov radiation in coupled long Josephson junctions

E. Goldobin, A. Wallraff, N. Thyssen, and A. V. Ustinov

Phys. Rev. B 57, 130--133 (1998)

1997

Delocking of flux-flow states in dc-driven magnetically coupled Josephson junctions

E. Goldobin, A. Wallraff, B. Malomed, and A. Ustinov

Phys. Lett. A 224, 191 - 195 (1997)

Effective length of annular long Josephson junctions with finite width: theory and experiment

A. Wallraff, D. Bolkhovsky, V. Kurin, N. Thyssen, and A. Ustinov

Inst. Phys. Conf. Ser. 158, 531 (1997)

Cherenkov radiation in coupled long Josephson junctions

E. Goldobin, A. Wallraff, A. Ustinov, and N. Thyssen

3, 219 (1997)

1996

Numerical Analysis of the Coherent Radiation Emission by Two stacked Josephson flux--flow Oscillators

A. Wallraff, E. Goldobin, and A. Ustinov

J. Appl. Phys. 80, 6523 (1996)