Dicke superradiance in degenerate quantum matter: interplay of exchange statistics and spatial confinement

TL;DR

This paper explores how spatial confinement and exchange statistics influence superradiance and subradiance in quantum degenerate systems, using a dissipative field theoretic approach.

Contribution

It introduces a Lindblad master equation framework that captures the nonlinear dynamics of motional and electronic states, highlighting the roles of bosonic enhancement and Pauli blocking.

Findings

Identifies thermal and recoil-induced routes to distinguishable dynamics.

Provides a benchmark for collective emission in quantum-degenerate atomic systems.

Abstract

Collective radiance effects in quantum degenerate systems, such as superradiance and subradiance of a partially inverted ensemble, are shaped by the interplay of spatial confinement and exchange statistics. We investigate this interplay using a purely dissipative field theoretic quartic Lindblad master equation, which captures the nonlinear dynamics of the combined motional and electronic manifolds. This approach captures the interplay between the permutational symmetry of the Lindbladian and the exchange symmetry of the particles, quantifying how bosonic enhancement and Pauli blocking dictate superradiant and subradiant scaling. We identify two distinct routes to distinguishable dynamics: thermal dilution of the initial state at high temperatures and the dynamical breakdown of collective order via recoil induced transport in soft traps. This analysis provides a benchmark for collective emission in quantum-degenerate atomic systems with coupled motional and internal dynamics, such as optical lattice clocks and spinor gases, when dissipation is engineered to control recoil and motional heating.