Decohering quantum statistics: Suppression of BEC

Details Decohering quantum statistics: Suppression of BEC Decohering quantum statistics: Suppression of BEC

2004-07-31

arxiv.org/abs/cond-mat/0408007v1

Physics

Condensed Matter

Statistical Mechanics

4 pages

Scientific paper

It is argued that the environment induced decoherence between spatially separated parts of the wavefunction for an open quantum system also classicalizes the quantum statistics which is based on indistinguishability. This may imply a suppression of the BEC upon dilution with, e.g., isotopic fermions, in that the usual phase-space density criterion $n\Lambda^3 >$ 2.612 is supplemented by the condition $n\Lambda^3 > \hbar\gamma/\sqrt{4\pi}k_BT$, $\gamma$ being the friction coefficient subtended by the environment, i.e., the fermions in this case. PACS 03.75.Gg, 03.75.Hh, 03.75.Kk

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