Photon-assisted charge-parity jumps in a superconducting qubit

M. Houzet; K. Serniak; G. Catelani; M. H. Devoret; L. I. Glazman

doi:10.1103/PhysRevLett.123.107704

Photon-assisted charge-parity jumps in a superconducting qubit

Mesoscale and Nanoscale Physics 2019-09-12 v1 Superconductivity Quantum Physics

Authors: M. Houzet , K. Serniak , G. Catelani , M. H. Devoret , L. I. Glazman

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Abstract

We evaluate the rates of energy and phase relaxation of a superconducting qubit caused by stray photons with energy exceeding the threshold for breaking a Cooper pair. All channels of relaxation within this mechanism are associated with the change in the charge parity of the qubit, enabling the separation of the photon-assisted processes from other contributions to the relaxation rates. Among the signatures of the new mechanism is the same order of rates of the transitions in which a qubit looses or gains energy.

Keywords

superconducting qubit stray photons cooper pair charge parity energy relaxation phase relaxation

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@article{arxiv.1904.06290,
  title  = {Photon-assisted charge-parity jumps in a superconducting qubit},
  author = {M. Houzet and K. Serniak and G. Catelani and M. H. Devoret and L. I. Glazman},
  journal= {arXiv preprint arXiv:1904.06290},
  year   = {2019}
}

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6 pages, 1 figure

Photon-assisted charge-parity jumps in a superconducting qubit

Abstract

Keywords

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