Medium modification of two-particle scattering in nonideal Bose systems

Abstract

Medium modification of scattering properties in interacting Bose systems are considered by solving the Bethe-Salpeter equation. An equation of state for the normal phase (generalized Beth-Uhlenbeck formula) is given using the in-medium phase shifts to include two-particle correlations. Conclusions are drawn for systems of bosonic atoms with repulsive interaction such as sodium ${}^{23}$Na and rubidium ${}^{87}$Rb. It is shown that the in-medium scattering length and the absolute value of the in-medium scattering phase shift for low scattering energies increase with density.

References in corpus (2)

• Conserving and Gapless Approximations for an Inhomogeneous Bose Gas at Finite Temperatures
• Moment of Inertia and Superfluidity of a Trapped Bose Gas

Cited by in corpus (4)

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• Phase diagram for interacting Bose gases
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