Please be informed about the following QSIT Seminar.
Date: Tuesday
March 8, 2011
Time: 13:00
Place: HIL E
7
Host: Tilman
Esslinger
Non-equilibrium quantum phase transition with
atoms in optical resonators
Peter Domokos
Research Institute for Solid State Physics and Optics,
Budapest, Hungary
Laser-driven ultracold atoms in a Bose-Einstein condensate
coupled to the single mode of a high-finesse optical cavity exhibit a phase
transition from the homogeneous into a periodically patterned distribution
above a critical driving strength. This process of self-organization is
closely related to the quantum phase transition of the spin-boson Dicke-model from the
normal to the superradiant phase. However, the
cavity QED system is intrinsically open and the system is not in equilibrium
even at zero temperature. We will discuss the influence of the irreversible
photon loss through the cavity mirrors on the main features of the criticality.