Correlations in a BEC collision: First-principles quantum dynamics with 150,000 atoms

Deuar, P. and Drummond, Peter D. (2007) Correlations in a BEC collision: First-principles quantum dynamics with 150,000 atoms. Physical Review Letters, 98 12: 120402.1-120402.4. doi:10.1103/PhysRevLett.98.120402

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Author Deuar, P.
Drummond, Peter D.
Title Correlations in a BEC collision: First-principles quantum dynamics with 150,000 atoms
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
1079-7114
Publication date 2007-03-23
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.98.120402
Open Access Status File (Publisher version)
Volume 98
Issue 12
Start page 120402.1
End page 120402.4
Total pages 4
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2008
Language eng
Subject C1
240201 Theoretical Physics
780102 Physical sciences
Abstract The quantum dynamics of colliding Bose-Einstein condensates with 150 000 atoms are simulated directly from the Hamiltonian using the stochastic positive-P method. Two-body correlations between the scattered atoms and their velocity distribution are found for experimentally accessible parameters. Hanbury Brown–Twiss or thermal-like correlations are seen for copropagating atoms, while number correlations for counterpropagating atoms are even stronger than thermal correlations at short times. The coherent phase grains grow in size as the collision progresses with the onset of growth coinciding with the beginning of stimulated scattering. The method is versatile and usable for a range of cold atom systems.
Keyword Physics, Multidisciplinary
Bose-einstein Condensation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Tue, 06 May 2008, 11:33:32 EST by Stephanie Golding on behalf of School of Mathematics & Physics