Electromotive force in driven topological quantum circuits

Autor:	Kenawy, Ahmed, Hassler, Fabian, Riwar, Roman-Pascal
Rok vydání:	2022
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. B 106, 035430 (2022)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.106.035430
Popis:	Time-dependent control of superconducting quantum circuits is a prerequisite for building scalable quantum hardware. The quantum description of these circuits is complicated due to the electromotive force (emf) induced by time-varying magnetic fields. Here, we examine how the emf modifies the fractional Josephson effect. We show that a time-varying flux introduces a new term that depends on the geometry of both the circuit and the applied magnetic field. This term can be probed via current and charge measurements in closed-loop and open-circuit geometries. Our results refine the current understanding of how to properly describe time-dependent control of topological quantum circuits. Comment: 13 pages, 5 figures; added appendix C, added acknowledgments, improved overall flow, results and figures unchanged
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2204.05087 Zobrazit plný text záznamu View this record from Arxiv