TY  - JOUR
AU  - Catelani, Gianluigi
AU  - Basko, Denis
TI  - Non-equilibrium quasiparticles in superconducting circuits: photons vs. phonons
JO  - SciPost physics
VL  - 6
SN  - 2542-4653
CY  - Amsterdam
PB  - SciPost Foundation
M1  - FZJ-2019-00974
SP  - 013
PY  - 2019
AB  - We study the effect of non-equilibrium quasiparticles on the operation of a superconducting device (a qubit or a resonator), including heating of the quasiparticles by the device operation. Focusing on the competition between heating via low-frequency photon absorption and cooling via photon and phonon emission, we obtain a remarkably simple non-thermal stationary solution of the kinetic equation for the quasiparticle distribution function. We estimate the influence of quasiparticles on relaxation and excitation rates for transmon qubits, and relate our findings to recent experiments.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000457556500013
DO  - DOI:10.21468/SciPostPhys.6.1.013
UR  - https://juser.fz-juelich.de/record/860190
ER  -