Suppression of inter-band heating for random driving

TL;DR

This paper demonstrates that structured random drives, specifically random multipolar drives, can suppress inter-band heating, enabling the observation of non-equilibrium phenomena in a long-lived prethermal regime.

Contribution

It introduces the use of random multipolar drives to control inter-band heating, extending the regime where drive-induced phenomena can be studied.

Findings

Inter-band heating can be suppressed using structured random drives.

Random multipolar drives enable long-lived prethermal states.

Control over excitation to higher bands is achieved away from high-frequency regimes.

Abstract

Heating to high-lying states strongly limits the experimental observation of driving induced non-equilibrium phenomena, particularly when the drive has a broad spectrum. Here we show that, for entire families of structured random drives known as random multipolar drives, particle excitation to higher bands can be well controlled even away from a high-frequency driving regime. This opens a window for observing drive-induced phenomena in a long-lived prethermal regime in the lowest band.