Dissipation-stabilized magnetic phases in anisotropic spin systems*
We consider strongly interacting systems of effective spins, subject to dissipative spin-flip processes associated with optical pumping. We predict the existence of novel magnetic phases in the steady state of this system, which emerge due to the competition between coherent and dissipative processes. Specifically, for strongly anisotropic spin-spin interactions, we find ferromagnetic, antiferromagnetic, and spin-density-wave steady states, which are separated by nonequilibrium phase transitions meeting at a Lifshitz point. Effects of quantum fluctuations and disorder, as well as experimental implementations in ultracold atoms and trapped ions, are discussed.
* T.E. Lee, S. Gopalakrishnan, and M.D. Lukin, Phys. Rev. Lett. 110, 257204 (2013)