Multiplexed Readout of Transmon Qubits with Josephson Bifurcation Amplifiers
ORAL
Abstract
Achieving individual qubit readout is a major challenge in the development of scalable superconducting quantum processors. We have implemented the multiplexed readout of a four transmon qubit circuit using non-linear resonators operated as Josephson bifurcation amplifiers. We demonstrate the simultaneous measurement of Rabi oscillations of the four transmons. We find that multiplexed Josephson bifurcation is a high-fidelity readout method, the scalability of which is not limited by the need of a large bandwidth nearly quantum-limited amplifier as is the case with linear readout resonators.
*Support from FP7QIPC Scaleqit, CCQED, NSERC is acknowledged.
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Authors
Vivien Schmitt
Service de Physique de l'Etat Condens\'{e} (CNRS URA 2464), IRAMIS, CEA Saclay, 91191 Gif-sur-Yvette, France
Daniel Esteve
Service de Physique de l'Etat Condens\'{e} (CNRS URA 2464), IRAMIS, CEA Saclay, 91191 Gif-sur-Yvette, France
Quantronics Group, CEA-Saclay
Xin Zhou
Service de Physique de l'Etat Condens\'{e} (CNRS URA 2464), IRAMIS, CEA Saclay, 91191 Gif-sur-Yvette, France
Kristinn Juliusson
Service de Physique de l'Etat Condens\'{e} (CNRS URA 2464), IRAMIS, CEA Saclay, 91191 Gif-sur-Yvette, France
Alexandre Blais
D\'{e}partment de Physique, Universit\'{e} de Sherbrooke, Sherbrooke, Qu\'{e}bec, Canada
D\'epartement de Physique, Universit\'e de Sherbrooke, Sherbrooke, Qu\'ebec, Canada J1K 2R1
Sherbrooke University
Universit\'e de Sherbrooke
D\'epartement de Physique, Universit\'e de Sherbrooke
Patrice Bertet
Quantronics Group, CEA-Saclay
Service de Physique de l'Etat Condens\'{e} (CNRS URA 2464), IRAMIS, CEA Saclay, 91191 Gif-sur-Yvette, France
Denis Vion
Service de Physique de l'Etat Condens\'{e} (CNRS URA 2464), IRAMIS, CEA Saclay, 91191 Gif-sur-Yvette, France
