Kastening, Boris (2004)
Shift of BEC temperature of homogenous weakly interacting Bose gas.
In: Laser Physics, 14 (4)
Artikel, Bibliographie
Kurzbeschreibung (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.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2004 |
| Autor(en): | Kastening, Boris |
| Art des Eintrags: | Bibliographie |
| Titel: | Shift of BEC temperature of homogenous weakly interacting Bose gas |
| Sprache: | Englisch |
| Publikationsjahr: | April 2004 |
| Verlag: | INTERPERIODICA, Birmingham, USA |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Laser Physics |
| Jahrgang/Volume einer Zeitschrift: | 14 |
| (Heft-)Nummer: | 4 |
| Kurzbeschreibung (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. |
| Freie Schlagworte: | RECURSIVE GRAPHICAL CONSTRUCTION, RENORMALIZATION-GROUP THEORY, TRANSITION-TEMPERATURE, EINSTEIN CONDENSATION, PERTURBATION-THEORY, LAMBDA-TRANSITION, FEYNMAN DIAGRAMS, PHI(4), ENSEMBLE, BEHAVIOR |
| Zusätzliche Informationen: | Talk presented at the “12th Annual International Laser Physics Workshop,” LPHYS'03 (Hamburg, Germany, August 25-29, 2003) |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Dünne Schichten 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 09 Jan 2013 08:43 |
| Letzte Änderung: | 05 Mär 2013 10:04 |
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