Plasma modes in capacitively coupled superconducting nanowires

Alex Latyshev; Andrew G Semenov; Andrei D Zaikin

doi:10.3762/bjnano.13.24

Plasma modes in capacitively coupled superconducting nanowires

Beilstein J Nanotechnol. 2022 Mar 4:13:292-297. doi: 10.3762/bjnano.13.24. eCollection 2022.

Authors

Alex Latyshev^{1

2}, Andrew G Semenov^{1

3}, Andrei D Zaikin^{1

4}

Affiliations

¹ I.E. Tamm Department of Theoretical Physics, P.N. Lebedev Physical Institute, 119991 Moscow, Russia.
² National Research University Higher School of Economics, 101000 Moscow, Russia.
³ Department of Physics, Moscow Pedagogical State University, 119435 Moscow, Russia.
⁴ Institute for Quantum Materials and Technologies, Karlsruhe Institute of Technology (KIT), 76021 Karlsruhe, Germany.

Abstract

We investigate plasma oscillations in long electromagnetically coupled superconducting nanowires. We demonstrate that in the presence of inter-wire coupling plasma modes in each of the wires get split into two "new" modes propagating with different velocities across the system. These plasma modes form an effective dissipative quantum environment interacting with electrons inside both wires and causing a number of significant implications for the low-temperature behavior of the systems under consideration.

Keywords: plasma modes; quantum fluctuations, quantum phase slips; superconducting nanowires.

Grants and funding

AGS acknowledges support by the Russian Science Foundation (project No. 19-72-10101). AL acknowledges support by the Russian Foundation for Basic Research (Project No.18-29-20033).