Prog. Theor. Phys. Vol. 71 No. 5 (1984) pp. 894-905
Momentum Distribution Condition in the Cluster Variation Method
Chiyoda Institute of Technology, Shitaya-1, Taito-ku, Tokyo 110
*Science and Engineering Research Laboratory, Waseda University, Tokyo 160
(Received December 26, 1983)
The distribution function of the particle occupation probability in the momentum space is investigated by the cluster variation method. The distribution function calculated in the two-body cluster approximation often gives unreasonably too many particles jumping out of the degenerate state. A new condition is introduced to suppress the excitation of too many particles. The condition is applied to liquid helium-4 and neutron matter. Numerical results show that the condition regulates the behavior of the momentum distribution function, and is useful to avoid an unnatural kinetic energy.
DOI : 10.1143/PTP.71.894
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Citing Article(s) :
Progress of Theoretical Physics Vol. 91 No. 6 (1994) pp. 1149-1172
A Variational Method for Infinite Fermion Systems with Central Forces
Masatoshi Takano and Masami Yamada