Steady-State Many-Body Entanglement of Hot Reactive Fermions

Michael Foss-Feig, Andrew J. Daley, James K. Thompson, Ana Maria Rey
2012 Physical Review Letters  
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
more » ... nt 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.
doi:10.1103/physrevlett.109.230501 pmid:23368173 fatcat:niqzswodxvea3khbaho32uyp4q