City College will close today, January 26, 2015, at 3 p.m. due to inclement weather. Only essential personnel are expected to report to or remain at work for regular business hours. The college is closed Tuesday, January 27, 2015. Only essential personnel report to work.
Physics Colloquium: "Exotic Quantum States of Spin-Orbit Coupled Bosons"
Wed, Feb 06
4:00 PM — 5:00 PM
Marshak 160 Convent Avenue
Marshak , MR-418N
Presented by Professor Tigran A. Sedrakyan, The William I. Fine Theoretical Physics Institute.Abstract:
The recently discovered spin-orbit coupled boson systems are remarkable for their capacity to explore physics that may not be revealed in any other way. The spin-orbit couplings, which can be artificially engineered in cold-atom experiments, in many instances lead to single-particle dispersion relations exhibiting multiple minima or even degenerate manifold of minimal energy states. It is entirely the effect of collisions (i.e. boson-boson interactions) which lifts this degeneracy and leads to an amazing variety of completely new quantum many-body states. This talk describes a theoretical discovery of a novel phase of matter, where, at low densities, bosons essentially redress themselves and behave as fermions. This state is a composite fermion state with a Chern-Simons gauge field and filling factor one.