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Non-equilibrium quasiparticles in superconducting circuits: photons vs. phonons
by G. Catelani, D. M. Basko
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Submission summary
| Authors (as registered SciPost users): | Denis Basko · Gianluigi Catelani |
| Submission information | |
|---|---|
| Preprint Link: | scipost_201811_00008v2 (pdf) |
| Date accepted: | 2019-01-21 |
| Date submitted: | 2018-12-18 01:00 |
| Submitted by: | Basko, Denis |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Theoretical |
Abstract
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.
Author comments upon resubmission
we submit a revised version of our manuscript. We have taken into account all the Referee's comments, so we are hopeful that the paper can be accepted for publication in its present form.
List of changes
We thank the referee for the comments. We agree with them, here are the details of the modifications.
- We added a figure in the third section, where we show schematically the distribution function in the two regimes.
- In Sec. 3.2, we moved the summary of its results to the end of the section.
- We gave a label to the last equation of Sec. 2 and expanded the discussion in the beginning of Sec. 3.1, to address the last remark of the referee.
- We added the text to the footnote, to clarify how the equation is obtained.
Published as SciPost Phys. 6, 013 (2019)