Dominant Andreev Reflection through Nonlinear Radio-Frequency Transport

TL;DR

This paper presents a theoretical study of laser-induced Andreev reflection in a Fermi superfluid-normal system, revealing unconventional non-Ohmic transport and unique zero-detuning behavior with potential implications for quantum information and black hole physics.

Contribution

It introduces a novel theoretical model for laser-induced Andreev reflection in Fermi superfluids, highlighting unconventional transport phenomena and zero-detuning dominance.

Findings

Andreev current exhibits non-Ohmic behavior at zero temperature.

At zero detuning, Andreev current dominates regardless of chemical potential bias.

Results suggest potential links to black hole information paradox.

Abstract

We theoretically propose the laser-induced Andreev reflection between two-component Fermi superfluid and normal states via spatially-uniform Rabi couplings. By analyzing the tunneling current between the superfluid and normal states up to the fourth order in the Rabi couplings, we find that the Andreev current exhibits unconventional non-Ohmic transport at zero temperature. Remarkably, the Andreev current gives the only contribution in the synthetic junction system at zero detunings regardless of the ratio of the chemical potential bias to the superfluid gap, which is in sharp contrast to that in the conventional superconductor-normal metal junction. Our result may also pave a way for understanding the black hole information paradox through the Andreev reflection as a quantum-information mirror.