From Traveling Waves to Synthetic Gauge Fields: A Field-Free Route to Superconducting Diode Effect
Abstract
The superconducting diode effect requires the forward and reverse bias currents to differ, a scenario achieved via inversion and time-reversal symmetries broken together. The latter, and the more crucial one, is inevitably achieved by a magnetic field. Here, we show that a spatio-temporally driven chemical potential of the form, μj(t)=μ+Vcos(ωt+kd j), achieves both at once. Applied to a helical Shiba chain, the drive transmutes a traveling Peierls phase via generating an odd-in-momentum term, equivalent to an imaginary next-nearest-neighbour Haldane-like hopping in real space. Remarkably, the protocol is spin-blind, which renders the time-reversal breaking via a synthetic gauge flux rather than an effective Zeeman field. The rectification is odd in the drive wavevector, with exact zeros at kd=nπ and an analytical optimum at kd=2π/3. It is however, even in the exchange coupling, J and persists even at J=0. Furthermore, the rectification scales inversely with the pair-breaking gap, yielding approximately 50% rectification in the topological phase and 10% in the trivial phase. Symmetry breaking is thus drive-controlled, allowing it to be switched on, tuned, and reversed without an external magnetic field.
Related
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BibTeX
@misc{kalita2026from,
title = {{From Traveling Waves to Synthetic Gauge Fields: A Field-Free Route to Superconducting Diode Effect}},
author = {Latu Kalita and Koustav Roy and Bilal Tanatar and Saurabh Basu},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.29865},
eprint = {2610.29865},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.29865},
}
RIS
TY - UNPB
TI - From Traveling Waves to Synthetic Gauge Fields: A Field-Free Route to Superconducting Diode Effect
AU - Latu Kalita
AU - Koustav Roy
AU - Bilal Tanatar
AU - Saurabh Basu
PY - 2026
DA - 2026/10/21
PB - arXiv
DO - 10.48550/arxiv.2610.29865
UR - https://arxiv.org/abs/2610.29865
AB - The superconducting diode effect requires the forward and reverse bias currents to differ, a scenario achieved via inversion and time-reversal symmetries broken together. The latter, and the more crucial one, is inevitably achieved by a magnetic field. Here, we show that a spatio-temporally driven chemical potential of the form, μ_j(t)=μ+Vcos(ωt+kd j), achieves both at once. Applied to a helical Shiba chain, the drive transmutes a traveling Peierls phase via generating an odd-in-momentum term, equivalent to an imaginary next-nearest-neighbour Haldane-like hopping in real space. Remarkably, the protocol is spin-blind, which renders the time-reversal breaking via a synthetic gauge flux rather than an effective Zeeman field. The rectification is odd in the drive wavevector, with exact zeros at kd=nπ and an analytical optimum at kd=2π/3. It is however, even in the exchange coupling, J and persists even at J=0. Furthermore, the rectification scales inversely with the pair-breaking gap, yielding approximately 50% rectification in the topological phase and 10% in the trivial phase. Symmetry breaking is thus drive-controlled, allowing it to be switched on, tuned, and reversed without an external magnetic field.
ER -