IQIM Postdoctoral and Graduate Student Seminar

Friday May 16, 2014 4:00 PM

Unconventional magnetism in dissipative atomic systems

Speaker: Tony Lee, Institute for Theoretical Atomic Molecular nad Optical Physics (ITAMP), Harvard University
Location: East Bridge 114

** 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.

Series IQIM Postdoctoral and Graduate Student Seminar Series

Contact: Marcia Brown at 626-395-4013 marciab@caltech.edu