İnce spektrum ve bose-einstein yoğunlaşıklarında uyarım ömrü
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Abstract (EN)
In this thesis we study two distinct mechanisms of phase diï¬usion in atomic Bose-Einstein condensates (BEC?s). The ï¬rst one is studied via a so-called toy-model andgives a ï¬nite life time that the ground state of a Bose-Einstein condensate can remaincoherent. This mechanism, which was before used for coherent states, is generalizedto squeezed and the thermal-coherent states, which we introduce as states havingboth coherent and thermal character. Then the recently introduced thin spectrumformalism is reviewed and applied to BEC?s in order to obtain a decay rate for ex-citations. Relation of thin spectra with Spontaneous Symmetry Breaking (SSB) isstudied and some expansions on the formalism are made.iv
Author
Turan Birol
How to Cite
Turan Birol (Master Thesis). İnce spektrum ve bose-einstein yoğunlaşıklarında uyarım ömrü, 2007, Koç University.
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