Few-Body Bound Complexes in One-dimensional Dipolar Gases and Non-Destructive Optical Detection

TL;DR

This paper investigates the formation and stability of few-body bound complexes in one-dimensional dipolar gases, proposing a non-destructive optical detection method for in-situ observation, with implications for many-body physics.

Contribution

It introduces a detailed analysis of stable few-body complexes in 1D dipolar systems and proposes a novel optical detection scheme for their real-time observation.

Findings

Stable dimers, trimers, and tetramers identified

Optical detection scheme enables in-situ observation

Implications for many-body physics discussed

Abstract

We consider dipolar interactions between heteronuclear molecules in low-dimensional geometries. The setup consists of two one-dimensional tubes. We study the stability of possible few-body complexes in the regime of repulsive intratube interaction, where the binding arises from intertube attraction. The stable dimers, trimers, and tetramers are found and we discuss their properties for both bosonic and fermionic molecules. To observe these complexes we propose an optical non-destructive detection scheme that enables in-situ observation of the creation and dissociation of the few-body complexes. A detailed description of the expected signal of such measurements is given using the numerically calculated wave functions of the bound states. We also discuss implications on the many-body physics of dipolar systems in tubular geometries, as well as experimental issues related to the external harmonic confinement along the tube and the prospect of applying an in-tube optical lattice to increase the effective dipole strength.