Kastening, Boris (2004)
Bose-Einstein condensation temperature of a homogenous weakly interacting Bose gas in variational perturbation theory through seven loops.
In: Physical Review A, 69 (4)
doi: 10.1103/PhysRevA.69.043613
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The shift of the Bose-Einstein condensation temperature for a homogenous weakly interacting Bose gas in leading order in the scattering length a is computed for given particle density n. Variational perturbation theory is used to resum the corresponding perturbative series for Dkf2l /Nu in a classical three-dimensional scalar field theory with coupling u and where the physical case of N=2 field components is generalized to arbitrary N. Our results for N=1,2,4 are in agreement with recent Monte Carlo simulations; for N=2, we obtain DTc /T0=s1.27±0.11dan1/3. We use seven-loop perturbative coefficients, extending earlier work by one loop order.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2004 |
| Autor(en): | Kastening, Boris |
| Art des Eintrags: | Bibliographie |
| Titel: | Bose-Einstein condensation temperature of a homogenous weakly interacting Bose gas in variational perturbation theory through seven loops |
| Sprache: | Englisch |
| Publikationsjahr: | 21 April 2004 |
| Verlag: | American Physical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review A |
| Jahrgang/Volume einer Zeitschrift: | 69 |
| (Heft-)Nummer: | 4 |
| DOI: | 10.1103/PhysRevA.69.043613 |
| Kurzbeschreibung (Abstract): | The shift of the Bose-Einstein condensation temperature for a homogenous weakly interacting Bose gas in leading order in the scattering length a is computed for given particle density n. Variational perturbation theory is used to resum the corresponding perturbative series for Dkf2l /Nu in a classical three-dimensional scalar field theory with coupling u and where the physical case of N=2 field components is generalized to arbitrary N. Our results for N=1,2,4 are in agreement with recent Monte Carlo simulations; for N=2, we obtain DTc /T0=s1.27±0.11dan1/3. We use seven-loop perturbative coefficients, extending earlier work by one loop order. |
| 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 08:47 |
| Letzte Änderung: | 05 Mär 2013 10:04 |
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