Quantum critical dynamics of a Josephson junction at the topological transition

Journal article (2021)

Authors

Vladislav D. Kurilovich Yale University
Chaitanya Murthy Stanford University
Pavel D. Kurilovich Yale University
B. van Heck University of California, Microsoft Quantum Lab Delft, BUS/Quantum Delft - QuTech Advanced Research Centre
Leonid I. Glazman Yale University
Chetan Nayak University of California
Research Group
BUS/Quantum Delft (QuTech Advanced Research Centre) (TU Delft)
Copyright: © 2021 Vladislav D. Kurilovich, Chaitanya Murthy, Pavel D. Kurilovich, B. van Heck, Leonid I. Glazman, Chetan Nayak
DOI: https://doi.org/10.1103/PhysRevB.104.014509
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Published Date

2021

Language

English

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Faculty

QuTech Advanced Research Centre

Department

Business Development

Research Group

BUS/Quantum Delft

Abstract

We find the admittance of a Josephson junction at or near a topological transition. The dependence of the admittance on frequency and temperature at the critical point is universal and determined by the symmetries of the system. Despite the absence of a spectral gap at the transition, the dissipative response may remain weak at low energies: . This behavior is strikingly different from the electromagnetic response of a normal metal. Away from the critical point, the scaling functions for the dependence of the admittance on frequency and temperature are controlled by at most two parameters.

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