Thermopower with broken time-reversal symmetry

TL;DR

This paper demonstrates that non-unitary noise effects cause thermopower to become asymmetric under magnetic field reversal, even in non-interacting systems, with analysis based on a three-dot ring structure with Aharonov-Bohm flux.

Contribution

It reveals the impact of non-unitary noise on thermopower symmetry, extending understanding beyond idealized models.

Findings

Thermopower becomes asymmetric under magnetic field reversal due to noise.

The effect is demonstrated in a three-dot ring with Aharonov-Bohm flux.

Non-interacting systems are affected by this asymmetry.

Abstract

We show that when non-unitary noise effects are taken into account the thermopower is in general asymmetric under magnetic field reversal, even for non-interacting systems. Our findings are illustrated in the example of a three-dot ring structure pierced by an Aharonov-Bohm flux.