Two-dimensional weakly interacting Bose gas: equation of state

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dc.creatorAstrakharchik, G. E.
dc.creatorBoronat, J.
dc.creatorCasulleras, J.
dc.creatorKurbakov, I. L.
dc.creatorLozovik, Yu. E.
dc.date2008-12-19
dc.date2009-05-14
dc.date.accessioned2026-07-07T13:14:18Z
dc.date.available2026-07-07T13:14:18Z
dc.descriptionThe equation of state of a weakly interacting two-dimensional Bose gas is studied at zero temperature by means of quantum Monte Carlo methods. Going down to as low densities as na^2 ~ 10^{-100} permits us for the first time to obtain agreement on beyond mean-field level between predictions of perturbative methods and direct many-body numerical simulation, thus providing an answer to the fundamental question of the equation of state of a two-dimensional dilute Bose gas in the universal regime (i.e. entirely described by the gas parameter na^2). We also show that the measure of the frequency of a breathing collective oscillation in a trap at very low densities can be used to test the universal equation of state of a two-dimensional Bose gas.
dc.descriptionNew data points added at smaller densities. Correspondingly Table I, Figs. 1 and 2 are updated. Results by L. Pricoupenko (Ref [15]) are given in Table II. Comment [25] by Y. Castin is added. Minor changes in response to referee comments
dc.identifierhttps://arxiv.org/abs/0812.3844
dc.identifierhttp://arxiv.org/abs/0812.3844
dc.identifierPhys. Rev. A 79, 051602(R) (2009)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/230166
dc.subjectQuantum Physics
dc.subjectOther Condensed Matter
dc.titleTwo-dimensional weakly interacting Bose gas: equation of state
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