Quasiparticle Dynamics in Epitaxial <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mi>Al</mml:mi></mml:math> - <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mrow><mml:mi>In</mml:mi><mml:mi>As</mml:mi></mml:mrow></mml:math> Planar Josephson Junctions

Quasiparticle (QP) effects play a significant role in the coherence and fidelity of superconducting quantum circuits. The Andreev bound states high-transparency Josephson junctions can act as low-energy traps for QPs, providing mechanism studying dynamics properties both QPs junction. Using locally injected thermal we study QP loss poisoning epitaxial Al-InAs incorporated interference device (SQUID) galvanically shorting resonator to ground. We observe changes resonance line shape frequency shifts consistent with trapping into clearing out ABSs when are phase biased. By monitoring mechanisms time, find time scale O(1μs) these dynamics, presence phonon-mediated QP-QP interactions. Our measurements suggest that electron-phonon interactions relaxation our system, while electron-photon govern mechanisms. results highlight QP-induced dissipation complex circuits fabricated on superconductor-semiconductor heterostructures.5 MoreReceived 16 March 2023Accepted 18 August 2023DOI:https://doi.org/10.1103/PRXQuantum.4.030339Published by American Physical Society under terms Creative Commons Attribution 4.0 International license. Further distribution this work must maintain attribution author(s) published article's title, journal citation, DOI.Published SocietyPhysics Subject Headings (PhySH)Research AreasMajorana statesQuasiparticles & collective excitationsPhysical SystemsSQUIDSemiconductorsSuperconducting devicesQuantum Information, Science TechnologyCondensed Matter, Materials Applied Physics