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Five-Loop Critical Temperature Shift in Weakly Interacting Homogeneous Bose-Einstein Condensate

H. Kleinert
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Abstract

Using variational perturbation theory, we calculate the shift in the critical temperature T_c up to five loops to lowest order in the scattering length a and find Delta T_c/T_c^{(0)} approx (1.14\pm0.11)an^{1/3}, where n is the particle density. Our result is lower than the latest Monte Carlo result (1.32\pm0.02)an^{1/3}.

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H. Kleinert. 2003-08-20. Five-Loop Critical Temperature Shift in Weakly Interacting Homogeneous Bose-Einstein Condensate. https://doi.org/10.1142/s0217984903006074

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