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Shift of BEC temperature of homogenous weakly interacting Bose gas

Kastening, Boris (2004):
Shift of BEC temperature of homogenous weakly interacting Bose gas.
In: Laser Physics, INTERPERIODICA, Birmingham, USA, pp. 586-590, 14, (4), ISSN 1054-660X, [Article]

Abstract

We report on the computation of the shift of the Bose-Einstein condensation temperature for a homogenous weakly interacting Bose gas in leading order in the diluteness parameter an(1/3), where a is the scattering length and n is the particle density. The perturbative series, which is afflicted by infrared divergences, is resummed by means of variational perturbation theory. Using coefficients through seven loops, we arrive at DeltaT(c)/T-c = 1.27 +/- 0.11 an(1/3), which compares favorably with recent Monte Carlo data.

Item Type: Article
Erschienen: 2004
Creators: Kastening, Boris
Title: Shift of BEC temperature of homogenous weakly interacting Bose gas
Language: English
Abstract:

We report on the computation of the shift of the Bose-Einstein condensation temperature for a homogenous weakly interacting Bose gas in leading order in the diluteness parameter an(1/3), where a is the scattering length and n is the particle density. The perturbative series, which is afflicted by infrared divergences, is resummed by means of variational perturbation theory. Using coefficients through seven loops, we arrive at DeltaT(c)/T-c = 1.27 +/- 0.11 an(1/3), which compares favorably with recent Monte Carlo data.

Journal or Publication Title: Laser Physics
Volume: 14
Number: 4
Publisher: INTERPERIODICA, Birmingham, USA
Uncontrolled Keywords: RECURSIVE GRAPHICAL CONSTRUCTION, RENORMALIZATION-GROUP THEORY, TRANSITION-TEMPERATURE, EINSTEIN CONDENSATION, PERTURBATION-THEORY, LAMBDA-TRANSITION, FEYNMAN DIAGRAMS, PHI(4), ENSEMBLE, BEHAVIOR
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 09 Jan 2013 08:43
Additional Information:

Talk presented at the “12th Annual International Laser Physics Workshop,” LPHYS'03 (Hamburg, Germany, August 25-29, 2003)

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