Lab Home | Phone | Search
Center for Nonlinear Studies  Center for Nonlinear Studies
 Home 
 People 
 Current 
 Affiliates 
 Visitors 
 Students 
 Research 
 ICAM-LANL 
 Publications 
 Conferences 
 Workshops 
 Sponsorship 
 Talks 
 Colloquia 
 Colloquia Archive 
 Seminars 
 Postdoc Seminars Archive 
 Quantum Lunch 
 Quantum Lunch Archive 
 CMS Colloquia 
 Q-Mat Seminars 
 Q-Mat Seminars Archive 
 P/T Colloquia 
 Archive 
 Kac Lectures 
 Kac Fellows 
 Dist. Quant. Lecture 
 Ulam Scholar 
 Colloquia 
 
 Jobs 
 Postdocs 
 CNLS Fellowship Application 
 Students 
 Student Program 
 Visitors 
 Description 
 Past Visitors 
 Services 
 General 
 
 History of CNLS 
 
 Maps, Directions 
 CNLS Office 
 T-Division 
 LANL 
 
Monday, July 30, 2007
3:00 PM - 4:00 PM
CNLS Conference Room (TA-3, Bldg 1690)

Colloquium

Rotating Bose-Einstein Condensates

Alexander Fetter
Stanford University

Trapped Bose-Einstein condensates (BECs) differ considerably from the standard textbook example of a uniform Bose gas. The trapped ground state introduces new intrinsic scales (the ground-state size d_0 and the ground-state energy E_0). At low angular velocity, the behavior of one vortex in a rotating condensate illustrates the effect of discrete quantized vorticity. For more rapid rotation, the condensate contains an array of many vortices. In this case, the centrifugal forces expand the condensate radially and shrink it axially; thus the condensate becomes effectively two-dimensional. When the external rotation speed approaches the frequency of the radial harmonic confining potential, the condensate enters the "lowest Landau level" limit, when a simple description becomes possible. Eventually, the system should make a quantum phase transition to a highly correlated state analogous to the quantum-Hall states of electrons in a strong magnetic field.

Host: David Roberts (CNLS)