Electromotive force in driven topological quantum circuits
Abstract
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.
Keywords
Cite
@article{arxiv.2204.05087,
title = {Electromotive force in driven topological quantum circuits},
author = {Ahmed Kenawy and Fabian Hassler and Roman-Pascal Riwar},
journal= {arXiv preprint arXiv:2204.05087},
year = {2022}
}
Comments
13 pages, 5 figures; added appendix C, added acknowledgments, improved overall flow, results and figures unchanged