X Conference of Young Scientists "Problems of Theoretical Physics"

Bose gas with repulsive interactions between particles

24 Dec 2019, 17:15

20m

322 (Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine)

Oral Physics of Nuclei and Elementary Particles Physics of Nuclei and Elementary Particles

Speaker

Yehor Bondar (Taras Shevchenko National University of Kyiv)

Description

Bose-Einstein condensation (BEC) and particle number fluctuations are considered in the gas of bosons with repulsive interactions between particles. Two different mean-field models of the interacting Bose gas are studied. They provide rather different predictions for the BEC transition temperatures and the scaled variances of particle number fluctuations. The behavior of the BE condensate in the different versions of the mean-field approach is also investigated.