We prove the Lee-Huang-Yang formula for the ground state energy of the 3D Bose gas with repulsive interactions described by the exponential function, in a simultaneous limit of weak coupling and high density. In particular, we show that the Bogoliubov approximation is exact in an appropriate parameter regime, as far as the ground state energy is concerned.
Giuliani, A., Seiringer, R. (2009). The ground state energy of the weakly interacting Bose gas at high density. JOURNAL OF STATISTICAL PHYSICS, 135, 915-934 [10.1007/s10955-009-9718-0].
The ground state energy of the weakly interacting Bose gas at high density
GIULIANI, ALESSANDRO;
2009-01-01
Abstract
We prove the Lee-Huang-Yang formula for the ground state energy of the 3D Bose gas with repulsive interactions described by the exponential function, in a simultaneous limit of weak coupling and high density. In particular, we show that the Bogoliubov approximation is exact in an appropriate parameter regime, as far as the ground state energy is concerned.File in questo prodotto:
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