Condensate fluctuations in the dilute Bose gas
نویسندگان
چکیده
منابع مشابه
Condensate fluctuations of a trapped, ideal Bose gas.
For a non-self-interacting Bose gas with a fixed, large number of particles confined to a trap, as the ground-state occupation becomes macroscopic, the condensate number fluctuations remain microscopic. However, this is the only significant aspect in which the grand canonical description differs from canonical or microcanonical in the thermodynamic limit. General arguments and estimates includi...
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The recent achievement of Bose-Einstein condensation (BEC) in trapped atoms of dilute gases [1–3] has been quickly followed by the quantitative measurements of the condensate’s properties. In particular the dependence of the fraction of atoms in the condensate on the temperature has been found to be in agreement with the theory of the noninteracting Bose gas in a harmonic trap [4]. From the poi...
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The low-density expansion for a homogeneous interacting Bose gas at zero temperature can be formulated as an expansion in powers of √ ρa, where ρ is the number density and a is the S-wave scattering length. Logarithms of ρa appear in the coefficients of the expansion. We show that these logarithms are determined by the renormalization properties of the effective field theory that describes the ...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2005
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.71.043605