Phys. Rev. 183, 334–338 (1969)Bose-Einstein Condensation for a Class of Wave FunctionsReceived 29 January 1969; published in the issue dated July 1969 It is verified that the class of wave functions used in variational calculations for 4He has Bose-Einstein condensation. These trial wave functions have the form of a product of pair functions. Two cases are considered: In the first the correlations in the wave function are assumed to be short range and in the second the correlations include also the long-range part due to the zero-point motion of phonons. The one- and two-dimensional system is briefly considered. © 1969 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRev.183.334
DOI:
10.1103/PhysRev.183.334
PACS:
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