Spontaneous Peierls dimerization and emergent bond order in one-dimensional dipolar gases

TL;DR

This paper explores how dipolar interactions in one-dimensional gases induce spontaneous dimerization and bond order, revealing a new quantum phase distinct from traditional Mott or spin-density wave states, with implications for experimental detection.

Contribution

It demonstrates, through analytical and numerical methods, that competing interactions lead to a novel spontaneously dimerized phase with bond order in dipolar gases.

Findings

Spontaneous dimerization stabilized by long-range dipolar interactions.

Distinct bond-ordering phase separate from Mott and spin-density waves.

Proposed in-situ imaging techniques to detect non-local order parameters.

Abstract

We investigate the effect of dipolar interactions in one-dimensional systems in connection with the possibility of observing exotic many-body effects with trapped atomic and molecular dipolar gases. By combining analytical and numerical methods, we show how the competition between short- and long-range interactions gives rise to frustrating effects which lead to the stabilization of spontaneously dimerized phases characterized by a bond-ordering. This genuine quantum order is sharply distinguished from Mott and spin-density wave phases, and can be unambiguously probed by measuring non local order parameters in-situ imaging techniques.