Coherence dynamics of two-mode condensates in asymmetric potentials
2006 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 73, no 1, 013602Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2006. Vol. 73, no 1, 013602
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:du-11209DOI: 10.1103/PhysRevA.73.013602ISI: 000235008900128OAI: oai:DiVA.org:du-11209DiVA: diva2:565615