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Thèse Année : 2009

Environment-induced dynamics in a dilute Bose-Einstein condensate

Alexej Schelle
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Résumé

We directly model the quantum many particle dynamics during the transition of a gas of N indistinguishable bosons into a Bose-Einstein condensate. To this end, we develop a quantitative quantum master equation theory, which takes into account two body interaction processes, and in particular describes the particle number fluctuations characteristic for the Bose-Einstein phase transition. Within the Markovian dynamics assumption, we analytically prove and numerically verify the Boltzmann ergodicity conjecture for a dilute, weakly interacting Bose-Einstein condensate. The new physical bottom line of our theory is the direct microscopic monitoring of the Bose-Einstein distribution during condensate formation in real-time, after a sudden quench of the non-condensate atomic density above the critical density for Bose-Einstein condensation.
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Dates et versions

tel-00438496 , version 1 (03-12-2009)
tel-00438496 , version 2 (01-01-2014)

Identifiants

  • HAL Id : tel-00438496 , version 2

Citer

Alexej Schelle. Environment-induced dynamics in a dilute Bose-Einstein condensate. Atomic Physics [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 2009. English. ⟨NNT : ⟩. ⟨tel-00438496v2⟩
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