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Journal Articles Physical Review Letters Year : 2014

Flux Qubits with Long Coherence Times for Hybrid Quantum Circuits

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M. Stern
  • Function : Author
Y. Kubo
  • Function : Author
C. Grezes
A. Bienfait
Denis Vion
  • Function : Author
Daniel Esteve
  • Function : Author
Patrice Bertet
  • Function : Author

Abstract

We present measurements of superconducting flux qubits embedded in a three dimensional copper cavity. The qubits are fabricated on a sapphire substrate and are measured by coupling them inductively to an on-chip superconducting resonator located in the middle of the cavity. At their flux-insensitive point, all measured qubits reach an intrinsic energy relaxation time in the 6-20 microseconds range and a pure dephasing time comprised between 3 and 10 microseconds. This significant improvement over previous works opens the way to the coherent coupling of a flux-qubit to individual spins.
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Dates and versions

cea-01384637 , version 1 (20-10-2016)

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M. Stern, G. Catelani, Y. Kubo, C. Grezes, A. Bienfait, et al.. Flux Qubits with Long Coherence Times for Hybrid Quantum Circuits. Physical Review Letters, 2014, 113 (12), pp.123601. ⟨10.1103/PhysRevLett.113.123601⟩. ⟨cea-01384637⟩
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