Floquet-Multiple Andreev Reflections
Abstract
Floquet theory describes quantum systems governed by time-periodic Hamiltonians, much as Bloch theory describes spatially periodic solids. In voltage-biased multiterminal Josephson junctions, the Josephson relation causes superconducting phase differences to evolve periodically in time, thereby providing an intrinsic Floquet drive. In this Letter, we consider three-terminal Josephson junctions formed on a ballistic two-dimensional normal conductor with a continuum of electronic states. We show that the quartet and higher-order multipair processes yield characteristic Floquet-multiple Andreev reflection (Floquet-MAR) finite-bias conductance and noise resonances that are parameterized by the bias voltage and electrochemical potential. This microscopic picture opens a route toward implementing and probing Floquet-MAR physics in ballistic multiterminal Josephson junctions.
Keywords
Cite
@article{arxiv.2605.02642,
title = {Floquet-Multiple Andreev Reflections},
author = {Régis Mélin and Romain Danneau and Morteza Kayyalha},
journal= {arXiv preprint arXiv:2605.02642},
year = {2026}
}
Comments
6 pages, 4 figures (main) + 15 pages, 3 figures (supplemental)