Bo Gao 2004 J. Phys. B: At. Mol. Opt. Phys. 37 L227 doi:10.1088/0953-4075/37/11/L02
Universal properties of Bose systems with van der Waals interaction
FREE ARTICLEBo Gao
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We show that universal properties of a many-atom quantum system exist at a much higher density, or a much shorter length scale, than those implied by traditional theories for a dilute Bose gas. In particular, a universal equation of state at length scale β6 = (mC6/
2)1/4 (corresponding to the van der Waals interaction) is defined and investigated by combining the concept of effective potential, the constrained variational method and the analytic solution for the van der Waals potential. In one application, we show that a many-atom Bose system with negative scattering length may form a metastable liquid Bose–Einstein condensate (BEC) state with an equilibrium density that is controlled by a scaled scattering length.
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Issue 11 (14 June 2004)
Received 2 March 2004
Published 17 May 2004
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Universal properties of Bose systems with van der Waals interaction
Bo Gao 2004 J. Phys. B: At. Mol. Opt. Phys. 37 L227
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