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Transition temperature of a dilute homogeneous imperfect Bose gas | | Peter Arnold
; Guy D. Moore
; | | Date: |
10 Mar 2001 | | Journal: | Phys.Rev.Lett. 87 (2001) 120401 | | Subject: | Condensed Matter; Atomic Physics | cond-mat hep-ph physics.atom-ph | | Abstract: | The leading-order effect of interactions on a homogeneous Bose gas is theoretically predicted to shift the critical temperature by an amount DeltaTc = # a_{scatt} n^{1/3} T_0 from the ideal gas result T_0, where a_{scatt} is the scattering length and n is the density. There have been several different theoretical estimates for the numerical coefficient #. We claim to settle the issue by measuring the numerical coefficient in a lattice simulation of O(2) phi^4 field theory in three dimensions---an effective theory which, as observed previously in the literature, can be systematically matched to the dilute Bose gas problem to reproduce non-universal quantities such as the critical temperature. We find # = 1.32 +- 0.02. | | Source: | arXiv, cond-mat/0103228 | | Services: | Forum | Review | PDF | Favorites | |
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