Dicke-Model Phase Transition in the Quantum Motion of a Bose-Einstein Condensate in an Optical Cavity
Abstract
We show that the motion of a laser-driven Bose-Einstein condensate in a high-finesse optical cavity realizes the spin-boson Dicke model. The quantum phase transition of the Dicke model from the normal to the superradiant phase corresponds to the self-organization of atoms from the homogeneous into a periodically patterned distribution above a critical driving strength. The fragility of the ground state due to photon measurement induced backaction is calculated.
- Publication:
-
Physical Review Letters
- Pub Date:
- April 2010
- DOI:
- 10.1103/PhysRevLett.104.130401
- arXiv:
- arXiv:0912.3260
- Bibcode:
- 2010PhRvL.104m0401N
- Keywords:
-
- 05.30.Rt;
- 37.30.+i;
- 42.50.Nn;
- Atoms molecules and ions in cavities;
- Quantum optical phenomena in absorbing dispersive and conducting media;
- Quantum Physics;
- Condensed Matter - Quantum Gases
- E-Print:
- 5 pages, 2 figures