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arXiv: 0710.1984

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Physical Review A: Atomic, Molecular and Optical Physics 77 (2008) 033631

Available versions:

v1 (2007-10-10)

v2 (2008-01-24)

v3 (2008-04-01)

Density modulations in an elongated Bose-Einstein condensate released from a disordered potential

David Clément 1, Philippe Bouyer 1, Alain Aspect 1, Laurent Sanchez-Palencia 1

(2008)

We observe large density modulations in time-of-flight images of elongated Bose-Einstein condensates, initially confined in a harmonic trap and in the presence of weak disorder. The development of these modulations during the time-of-flight and their dependence with the disorder are investigated. We render an account of this effect using numerical and analytical calculations. We conclude that the observed large density modulations originate from the weak initial density modulations induced by the disorder, and not from initial phase fluctuations (thermal or quantum).

1:	Laboratoire Charles Fabry de l'Institut d'Optique (LCFIO)
	Institut d'Optique Graduate School (IOGS) – CNRS : UMR8501 – Université Paris XI - Paris Sud

Research team: lcf-oa

Subject

:

Physics/Condensed Matter/Other Physics/Quantum Physics

Keyword(s): Bose-Einstein – condensate – disorder – speckle – density – phase – modulations – fluctuations – time-of-flight

hal-00178074, version 3

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From: Laurent Sanchez-Palencia <>

Submitted on: Tuesday, 1 April 2008 10:50:05

Updated on: Thursday, 1 July 2010 16:28:35