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VOLUME 57 (1993) | ISSUE 8 | PAGE 458
Two-dimensional Bose gas at low density
Wc propose a new method to describe the interacting bose gas at zero temperature. For three-dimensional system the correction to the groundstate energy in density is reproduced. For the two-dimensional dilute bose gas the groundstate energy in the leading order in the parameter |lna2/>|-1 where α is a scattering length is obtained.