Mirror symmetry breaking of superradiance in a dipolar BEC

TL;DR

This paper explores how dipole-dipole interactions in a large dipolar Bose-Einstein condensate cause mirror symmetry breaking in superradiance decay modes, revealing the role of anisotropic excitations.

Contribution

It demonstrates the impact of magnetic dipole-dipole interactions on superradiance symmetry in a many-body quantum system, using Bogoliubov transformation for analysis.

Findings

Mirror symmetry in superradiance decay modes is broken by anisotropic Bogoliubov excitations.

Dipole-dipole interactions significantly influence collective emission processes.

The study advances understanding of many-body effects in quantum optical phenomena.

Abstract

Dicke superradiance occurs when two or more emitters cooperatively interact via the electromagnetic field. This collective light scattering process has been extensively studied across various platforms, from atoms to quantum dots and organic molecules. Despite extensive research, the precise role of direct interactions between emitters in superradiance remains elusive, particularly in many-body systems where the complexity of interactions poses significant challenges. In this study, we investigate the effect of dipole-dipole interaction between 18,000 atoms in dipolar Bose-Einstein condensates (BECs) on the superradiance process. In dipolar BECs, we simplify the complex effect of anisotropic magnetic dipole-dipole interaction with Bogoliubov transformation. We observe that anisotropic Bogoliubov excitation breaks the mirror symmetry in decay modes of superradiance.