Quasiperiodically driven ratchets for cold atoms

TL;DR

This paper explores how quasiperiodic driving influences transport in cold atom ratchets, revealing conditions under which transport is suppressed or symmetries are restored, advancing understanding of driven quantum systems.

Contribution

It experimentally investigates the transition to quasiperiodicity in cold atom ratchets and links symmetry behavior to transport properties near the quasiperiodic limit.

Findings

Quasiperiodicity can suppress transport in cold atom ratchets.

Restoration of symmetries occurs near the quasiperiodic limit.

Transport behavior depends on the specific form of the driving signal.

Abstract

We investigate experimentally the route to quasiperiodicity in a driven ratchet for cold atoms, and examine the relationship between symmetries and transport while approaching the quasiperiodic limit. Depending on the specific form of driving, quasiperiodicity results in the complete suppression of transport, or into the restoration of the symmetries which hold for a periodic driving.