Ground state energy of a homogeneous Bose-Einstein condensate beyond Bogoliubov

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dc.creatorWeiss, Christoph
dc.creatorEckardt, Andre
dc.date2004-08-02
dc.date.accessioned2026-07-07T02:59:32Z
dc.date.available2026-07-07T02:59:32Z
dc.descriptionThe standard calculations of the ground-state energy of a homogeneous Bose gas rely on approximations which are physically reasonable but difficult to control. Lieb and Yngvason [Phys. Rev. Lett. 80, 2504 (1998)] have proved rigorously that the commonly accepted leading order term of the ground state energy is correct in the zero-density-limit. Here, strong indications are given that also the next to leading term is correct. It is shown that the first terms obtained in a perturbative treatment provide contributions which are lost in the Bogoliubov approach.
dc.description6 pages, accepted for publication in Europhys. Lett. http://www.epletters.ch/
dc.identifierhttps://arxiv.org/abs/cond-mat/0408023
dc.identifierhttp://arxiv.org/abs/cond-mat/0408023
dc.identifierEurophys. Lett. 68, 8 (2004)
dc.identifierdoi:10.1209/epl/i2004-10169-6
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24544
dc.subjectStatistical Mechanics
dc.titleGround state energy of a homogeneous Bose-Einstein condensate beyond Bogoliubov
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