Mesoscopic disorder in double-well optical lattices

TL;DR

This paper investigates mesoscopic disorder in double-well optical lattices, revealing the coexistence of ordered, disordered, and intermediate mixed states characterized by mesoscopic disordered regions within an overall ordered lattice.

Contribution

It introduces the concept of a mesoscopic disordered state in double-well optical lattices, expanding understanding of phase coexistence in such systems.

Findings

Existence of an intermediate mixed state with mesoscopic disordered regions.

Disordered regions coexist with ordered lattice in the intermediate state.

The study provides a theoretical framework for mesoscopic disorder in optical lattices.

Abstract

Double-well optical lattices are considered, each cite of which is formed by a double-well potential. The lattice is assumed to be in an insulating state and order and disorder are defined with respect to the displacement of atoms inside the double-well potential. It is shown that in such lattices, in addition to purely ordered and disordered states, there can exist an intermediate mixed state, where, inside a generally ordered lattice, there appear disordered regions of mesoscopic size.