IQIM Postdoctoral and Graduate Student Seminar

** Special One-Hour Seminar this week only ** Abstract: Cold atoms provide an opportunity to see new collective behavior far from equilibrium, since atomic systems are intrinsically dissipative due to spontaneous emission. I discuss the anisotropic XY model in the presence of spontaneous emission on every atom. It turns out that dissipation enriches the phase diagram, creating new phases like a spin-density-wave phase and a staggered-XY phase. Cold atoms can also simulate non-Hermitian Hamiltonians in a manner similar to heralded entanglement protocols. This leads to unusual behavior like sharp transitions for two atoms and quasi-long-range order in the absence of a continuous symmetry. I also discuss implementation with trapped ions, cavity QED, and atoms in optical lattices. Refreshments following the seminar on the Bridge Patio.