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Coherence dynamics of two-mode condensates in asymmetric potentials
Department of Physics and College of Optical Sciences, The University of Arizona, Tucson, Arizona 85721, USA.ORCID-id: 0000-0002-8049-2425
University of Arizona.
2006 (engelsk)Inngår i: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 73, nr 1, artikkel-id 013602Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Detection of weak forces with an accuracy beyond the standard quantum limit holds promise both for fundamental research and for technological applications. Schemes involving ultracold atoms for such measurements are now considered to be prime candidates for increased sensitivity. In this paper we use a combination of analytical and numerical techniques to investigate the possible subshot-noise estimation of applied force fields through detection of coherence dynamics of Bose-condensed atoms in asymmetric double-well traps. Following a semiclassical description of the system dynamics and fringe visibility, we present numerical simulations of the full quantum dynamics that demonstrate the dynamical production of phase squeezing beyond the standard quantum limit. Nonlinear interactions are found to limit the achievable amount to a finite value determined by the external weak force.

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2006. Vol. 73, nr 1, artikkel-id 013602
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URN: urn:nbn:se:du-11209DOI: 10.1103/PhysRevA.73.013602ISI: 000235008900128OAI: oai:DiVA.org:du-11209DiVA, id: diva2:565615
Tilgjengelig fra: 2012-11-07 Laget: 2012-11-07 Sist oppdatert: 2017-12-07bibliografisk kontrollert

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