Konstanz 1998 – wissenschaftliches Programm
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SYA: Symposium Bose-Einstein-Kondensation
SYA 4: Symposium Bose-Einstein-Kondensation IV
SYA 4.2: Vortrag
Dienstag, 17. März 1998, 14:30–14:45, R 513
Fourth Statistical Ensemble for the Bose-Einstein Condensate [1] — •Patrick Navez1, Kazimierz Rzazewski2,3,1, and Martin Wilkens1 — 1Institut f"ur Physik, Universit"at Potsdam, Am Neuen Palais 10, 14469 Potsdam — 2Center for Theoretical Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, 02-668 Warsaw, Poland — 3Fakultät für Physik, Universität Konstanz, 78434 Konstanz
We study the Bose-Einstein condensation with a fixed number of particles. On the basis of conventional statistical mechanics we introduce a novel ensemble, the so-called Maxwell’ demon ensemble, where only particle transfer (without energy exchange) is allowed. We demonstrate that the Maxwell’s demon ensemble can be used for a microcanonical description of the system. We compare our findings with the conventional analysis [2,3] and find perfect agreement.
[1] P. Navez, D. Bitouk, M. Gajda, Z. Idziaszek, K. Rzazewski, Phys. Rev. Lett. 79, 1789 (1997)
[2] S. Grossmann und M. Holthaus, Optics Express 1, 262 (1997); siehe http://epubs.osa.org/opticsexpress
[3] C. Weiss und M. Wilkens, Optics Express 1, 272 (1997); siehe http://epubs.osa.org/opticsexpress