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.
Cited by 4
Siddiqi, Engineering high-coherence superconducting qubits
Nat Rev Mater 6, 875 (2021) [Crossref]
Serniak et al., Direct Dispersive Monitoring of Charge Parity in Offset-Charge-Sensitive Transmons
Phys. Rev. Applied 12, 014052 (2019) [Crossref]
Glazman et al., Bogoliubov quasiparticles in superconducting qubits
SciPost Phys. Lect. Notes, 31 (2021) [Crossref]
Houzet et al., Photon-Assisted Charge-Parity Jumps in a Superconducting Qubit
Phys. Rev. Lett. 123, 107704 (2019) [Crossref]
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- 1 Jülich Aachen Research Alliance [JARA]
- 2 Université Grenoble Alpes / Grenoble Alpes University [UGA]