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- W2172113511 abstract "We review some recent theoretical work on the phase transition of interacting Bose gases in the presence of external trapping potentials. A general framework for the study of such questions is presented which is based on the application of perturbative momentum-shell renormalization group methods to the trapped gas in the uncondensed phase. After giving an overview of this approach, we first establish its validity by comparing to previous results for homogeneous and harmonically trapped gases. Using this theoretical framework, we then examine various aspects of how external potentials influence the physics of condensation. (i) By studying the case of general power-law potentials and complemented by arguments from variational perturbation theory, it is quantitatively worked out how a growing inhomogeneity of the trapping potential diminishes nonperturbative effects at the transition. (ii) It is shown how by superimposing a weak periodic potentials on the homogeneous system, the characteristic nonperturbative momentum scale of critical interacting Bose gases can be probed. (iii) For a gas in a random potential, it is studied how condensation is affected by the combined influence of disorder effects and particle interactions." @default.
- W2172113511 created "2016-06-24" @default.
- W2172113511 creator A5022320925 @default.
- W2172113511 date "2009-04-01" @default.
- W2172113511 modified "2023-10-14" @default.
- W2172113511 title "Phase transition of trapped interacting Bose gases" @default.
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- W2172113511 doi "https://doi.org/10.1134/s1054660x09040252" @default.
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