Dissipationless electron transport in photon-dressed nanostructures

TL;DR

This paper demonstrates that in strongly coupled electron-photon nanostructures, the ground state can support a nondissipative electric current, enabling dissipationless electron transport without Joule heating.

Contribution

It introduces a mechanism for dissipationless electron transport via photon dressing in nanostructures with broken time-reversal symmetry, such as quantum rings.

Findings

Ground electron-photon state supports nonzero current

Current flows without Joule heating in the ground state

Dissipationless transport occurs in circularly polarized photon-dressed nanostructures

Abstract

It is shown that the electron coupling to photons in field-dressed nanostructures can result in the ground electron-photon state with a nonzero electric current. Since the current is associated with the ground state, it flows without the Joule heating of the nanostructure and is nondissipative. Such a dissipationless electron transport can be realized in strongly coupled electron-photon systems with the broken time-reversal symmetry - particularly, in quantum rings and chiral nanostructures dressed by circularly polarized photons.