Journal
JOURNAL OF STATISTICAL PHYSICS
Volume 135, Issue 5-6, Pages 915-934Publisher
SPRINGER
DOI: 10.1007/s10955-009-9718-0
Keywords
Repulsive Bose gas; Ground state energy; Lee-Huang-Yang formula; Bogoliubov's approximation
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Funding
- U.S. National Science Foundation [PHY-0652356]
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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.
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