TY  - EJOUR
AU  - Kenawy, Ahmed
AU  - Hassler, Fabian
AU  - Riwar, Roman-Pascal
TI  - Time-dependent driving and topological protection in the fractional Josephson effect
PB  - arXiv
M1  - FZJ-2024-00754
PY  - 2023
AB  - The control of any type of quantum hardware invariably necessitates time-dependent driving. If the basis depends on the control parameter, the presence of a time-dependent control field yields an extra term in the Schrödinger equation that is often neglected. Here, we examine the effect of this term in a flux-controlled Majorana junction. We show that a time-varying flux gives rise to an electromotive force which is amplified when truncating to the junction's low-energy degrees of freedom. As a result, it compromises the robustness of the ground-state degeneracy present in the absence of the drive. The resulting flattening of the energy spectrum can be measured by a strong suppression of the dc supercurrent.
KW  - Superconductivity (cond-mat.supr-con) (Other)
KW  - Mesoscale and Nanoscale Physics (cond-mat.mes-hall) (Other)
KW  - FOS: Physical sciences (Other)
LB  - PUB:(DE-HGF)25
DO  - DOI:10.48550/ARXIV.2306.09440
UR  - https://juser.fz-juelich.de/record/1021461
ER  -