Bose-Einstein Condensation |
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We are engaged in theoretical studies of the properties of Bose
condensates formed from trapped and cooled dilute atomic vapors.
Such condensates (whose experimental observation has recently
been reported) offer the prospect of observing quantum
statistical phenomena in a macroscopic object. The weak
interaction between particles in these experimentally achieved
condensates means that there is now an opportunity for greater
understanding of this fascinating phenomenon.
While the theory of homogeneous dilute Bose gases at the absolute zero of temperature is fairly complete, several extensions to this theory are required in order to fully understand the current experiments. As a result, we are working to include the effects caused by inhomogeneities in the condensate, in particular those due to the trapping potential. We are also developing methods to describe condensates at non-zero temperatures. In this finite-T case, some particles will be thermally excited out of the condensate, and it is necessary to include the effects of these thermal atoms. Other important condensate property such as its response to external perturbations and the associated spectrum of elementary excitations have been studied. Issues of damping of elementary excitations are being delt with, and atom optics and "atom lasers" using Bose-condensate are now in the horizon, promising an exciting period of research to come.
The Oxford BEC theory team consists of Nick Proukakis, Sam Morgan, Martin Rusch, Stephen Choi and Keith Burnett. We collaborate closely with Mark Edwards (Georgia Southern University and NIST), Robert Dodd (University of Maryland and NIST) and Murray Holland (University of Colorado.)
Click here for an introduction to BEC in trapped atomic vapors, with a description of the JILA experiment that observed BEC.
Preprints and reprints available by post upon request.