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Journal Articles Physical Review A : Atomic, molecular, and optical physics Year : 2014

Multiplexed readout of transmon qubits with Josephson bifurcation amplifiers

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V Schmitt
  • Function : Author
Xin Zhou
K Juliusson
  • Function : Author
P Bertet
  • Function : Author
D Vion
  • Function : Author
D Esteve
  • Function : Author

Abstract

Achieving individual qubit readout is a major challenge in the development of scalable supercon-ducting 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.
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Dates and versions

cea-01384732 , version 1 (20-10-2016)

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V Schmitt, Xin Zhou, K Juliusson, D Blais, P Bertet, et al.. Multiplexed readout of transmon qubits with Josephson bifurcation amplifiers. Physical Review A : Atomic, molecular, and optical physics, 2014, 90 (6), pp.62333. ⟨10.1103/PhysRevA.90.062333⟩. ⟨cea-01384732⟩
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