Robust states of ultra-cold bosons in tilted optical lattices

TL;DR

This paper uncovers regular spectral structures in chaotic quantum gases of bosons in tilted lattices, revealing localized eigenstates that are resilient to external disturbances, advancing understanding of quantum state stability.

Contribution

It introduces the discovery of regular spectral structures and localized eigenstates in chaotic bosonic systems under tilt, highlighting their robustness.

Findings

Identification of regular structures in chaotic spectra

Eigenstates exhibit strong localization on the lattice

Localized states are dynamically robust against perturbations

Abstract

We identify regular structures in the globally chaotic spectra of an interacting bosonic quantum gas in tilted periodic potentials. The associated eigenstates exhibit strong localization properties on the lattice, and are dynamically robust against external perturbations.