Theoretical Physics Colloquium
Aspects of non-equilibrium many-body phenomena in quantum matter and light
by Dr. Manas Kulkarni (Princeton University)
Tuesday, August 19, 2014
from
to
(Asia/Kolkata)
at Colaba Campus ( AG69 )
at Colaba Campus ( AG69 )
Description |
Non-equilibrium quantum and classical systems have been of tremendous interest in both fundamental and applied physics. Recent experimental breakthroughs in atomic, condensed matter physics and quantum optics have given birth to new paradigms for studying out-of-equilibrium quantum systems. Understanding such phenomena requires a cross-disciplinary approach uniting ideas from these diverse fields. In this talk, I will address non-equilibrium aspects in both isolated and driven-dissipative systems. I will present a nonlinear hydrodynamic theory of a strongly interacting Fermi gas, which showed remarkable agreement with experiments [1,2]. For Bosonic systems, using high-performance computing and analytical results, I will present a deep connection between the Nonlinear Schrodinger equation (Gross-Pitaevskii equation) and Kardar-Parisi-Zhang universality class of stochastic dynamics [3,4,5]. Given the wide range of phenomena described by these equations, our results have implications in fields ranging from cold gases to nonlinear optics. I will then discuss a driven-dissipative system consisting of a quantum gas placed in an optical cavity and pumped by a laser [6]. I will describe the non-trivial dissipative properties near the critical point of the open quantum phase transition [7], which explained recent mysterious experimental findings [8]. I will also propose protocols to prepare entangled quantum states by engineering drive and dissipation in hybrid light-matter systems. Our work shows that far-from-equilibrium many-body physics is an extremely rich field where theory and experiments across several disciplines thrive together. (1) J. Joseph, J. E. Thomas, M. Kulkarni, A. G. Abanov, Phys. Rev. Let t. 106, 150401 (2) M. Kulkarni, A. G. Abanov, Phys. Rev. A, 86, 033614 (3) M. Kulkarni, A. Lamacraft, Phys. Rev. A 88, 021603, Rapid Communication (4) M. Kulkarni, D. A. Huse, H. Spohn (in preparation, 2014) (5) M. Kulkarni, Journal of Statistical Physics (invited article, 2014) (6) R. Mottl, F. Brennecke, K. Baumann, R. Landig, T. Donner, and T. Esslinger, Science 336, 1570 (2012) (7) M.Kulkarni, B. Oztop and H. E. Tureci, Phys. Rev. Lett, 111, 220408 (8) F. Brennecke, R. Mottl, K. Baumann, R. Landig, T. Donner, T. Esslinger, PNAS July 16, 2013 110, 11763. |