Quantum optics of chiral spin networks

Hannes Pichler, Tomás Ramos, Andrew J. Daley, Peter Zoller
2015 Physical Review A. Atomic, Molecular, and Optical Physics  
We study the driven-dissipative dynamics of a network of spin-1/2 systems coupled to one or more chiral 1D bosonic waveguides within the framework of a Markovian master equation. We determine how the interplay between a coherent drive and collective decay processes can lead to the formation of pure multipartite entangled steady states. The key ingredient for the emergence of these many-body dark states is an asymmetric coupling of the spins to left and right propagating guided modes. Such
more » ... d modes. Such systems are motived by experimental possibilities with internal states of atoms coupled to optical fibers, or motional states of trapped atoms coupled to a spin-orbit coupled Bose-Einstein condensate. We discuss the characterization of the emerging multipartite entanglement in this system in terms of the Fisher information.
doi:10.1103/physreva.91.042116 fatcat:ik6xktc4b5fexbohujnflimeba