Microwave spectroscopy of Schmid transition

Autor:	Houzet, Manuel, Yamamoto, Tsuyoshi, Glazman, Leonid I.
Rok vydání:	2023
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
Popis:	Schmid transition was introduced first as a superconductor-insulator transition in the zero-frequency response of a shunted Josephson junction in equilibrium at zero temperature. As it is typical for a quantum impurity problem, at finite frequencies the transition is broadened to a crossover. Modern attempts to find Schmid transition rely on finite-frequency measurements of a quantum circuit. We predict the frequency dependence of the admittance and reflection phase shift for a high-impedance transmission line terminated by a Josephson junction for a wide variety of devices, from a charge qubit to a transmon. Our results identify the circuit parameters allowing for the universal scaling of the responses with frequency, thus helping to identify the Schmid transition from the finite-frequency measurements. Comment: 6+5 pages, 2 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2308.16072 Zobrazit plný text záznamu View this record from Arxiv