Steady-state many-body entanglement of hot reactive fermions

TL;DR

This paper demonstrates that hot reactive fermions naturally evolve into highly entangled steady states through their intrinsic collisions, without external intervention, which could enhance spectroscopic precision in atomic experiments.

Contribution

It reveals a novel mechanism where reactive fermions develop steady-state entanglement spontaneously, expanding understanding of many-body quantum dynamics.

Findings

Fermionic gases evolve into entangled Dicke states naturally.

Steady-state entanglement arises without external control.

Potential applications in improving spectroscopic accuracy.

Abstract

Entanglement is typically created via systematic intervention in the time evolution of an initially unentangled state, which can be achieved by coherent control, carefully tailored non-demolition measurements, or dissipation in the presence of properly engineered reservoirs. In this paper we show that two-component Fermi gases at ~\mu K temperatures naturally evolve, in the presence of reactive two-body collisions, into states with highly entangled (Dicke-type) spin wavefunctions. The entanglement is a steady-state property that emerges---without any intervention---from uncorrelated initial states, and could be used to improve the accuracy of spectroscopy in experiments with fermionic alkaline earth atoms or fermionic groundstate molecules.