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Nonuniversal Equation of State of the Two-Dimensional Bose Gas

  Articoli su Riviste JCR/ISI  (anno 2017)

Autori:  Salasnich L

Affiliazione Autori:  Università di Padova e INO-CNR

Riassunto:  For a dilute two-dimensional Bose gas the universal equation of state has a logarithmic dependence on the s-wave scattering length. Here we derive nonuniversal corrections to this equation of state, taking account of finite-range effects of the interatomic potential. Our beyond-mean-field analytical results are obtained performing dimensional regularization of divergent zero-point quantum fluctuations within the finite-temperature formalism of functional integration. In particular, we find that in the grand canonical ensemble the pressure has a nonpolynomial dependence on the finite- range parameter and it is a highly nontrivial function of chemical potential and temperature.

Rivista/Giornale:  PHYSICAL REVIEW LETTERS
Volume n.:  118      Pagine da: 130402  a: 130402
Collegamento Web del Prodotto: Clicca qui

*Impact Factor della Rivista: (2017) 8.839
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  19/05/2019

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