Published November 2011
| Version v1
Journal article
Virial expansion with Feynman diagrams
Creators
- 1. Laboratoire de Physique Statistique, Ecole Normale Superieure, UPMC Universite Paris 06, Universite Paris Diderot, CNRS, 24 rue Lhomond, FR-75005 Paris (France)
Description
We present a field theoretic method for the calculation of the second and third virial coefficients b2 and b3 of two-species fermions interacting via a contact interaction. The method is mostly analytic. We find a closed expression for b3 in terms of the two- and three-body T matrices. We recover numerically, at unitarity, and also in the whole Bose-Einstein-condensate-BCS crossover, previous numerical results for the third virial coefficient b3.
Additional details
Identifiers
- DOI
- 10.1103/PhysRevA.84.053633;
- arXiv
- arXiv:1109.4794v1;
Publishing Information
- Journal Title
- Physical Review. A
- Journal Volume
- 84
- Journal Issue
- 5
- Journal Page Range
- p. 053633-053633.8
- ISSN
- 1050-2947
- CODEN
- PLRAAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 44053575
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- BCS THEORY; BOSE-EINSTEIN CONDENSATION; FERMIONS; FEYNMAN DIAGRAM; PARTICLE INTERACTIONS; QUANTUM FIELD THEORY; S MATRIX; THREE-BODY PROBLEM; UNITARITY; VIRIAL EQUATION
- Descriptors DEC
- DIAGRAMS; EQUATIONS; FIELD THEORIES; INFORMATION; INTERACTIONS; MANY-BODY PROBLEM; MATRICES
Optional Information
- Notes
- (c) 2011 American Institute of Physics