Correlation evolution in dilute Bose-Einstein condensates after quantum quenches

The universal forms of quantum density and phase correlations after an interaction quench are found for dilute 1d, 2d, and 3d condensates. A Bogoliubov approach in a local density aproximation is used. We obtain compact expressions for the most visible effects. Our results show how loss of phase coh...

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Bibliographic Details
Published inarXiv.org
Main Authors Pietraszewicz, Joanna, Stobińska, Magdalena, Deuar, Piotr
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 19.02.2019
Subjects
Bose-Einstein condensates
Correlation
Density
Dilution
Image resolution
Phase coherence
Physics - Quantum Gases
Quantum phenomena
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Summary:The universal forms of quantum density and phase correlations after an interaction quench are found for dilute 1d, 2d, and 3d condensates. A Bogoliubov approach in a local density aproximation is used. We obtain compact expressions for the most visible effects. Our results show how loss of phase coherence and antibunching are built up after the quench by quantum fluctuations. We demonstrate further that the density correlations can be observed even with imaging resolution much worse than healing length. This indicates that the direct measurement of counterpropagating atom pairs in situ in a continuum system is realistic. The conditions in contemporary 1d experiments are especially favorable for the correlation wave observations.
ISSN:2331-8422
DOI:10.48550/arxiv.1310.1301