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Prog. Theor. Phys. Vol. 56 No. 1 (1976) pp. 16-30

[ Full Text PDF : FREE ACCESS (1102K) ]

Momentum Distribution of an Interacting Many-Boson System at High Density

Toshiyuki Nishiyama

Department of Physics, College of General Education, Osaka University, Toyonaka, Osaka 560

(Received December 22, 1975)

Abstract:

The momentum distribution function np is obtained for an interacting many-boson system at high density using the Rayleigh-Schrödinger perturbation theory in the scheme of the density and phase operator approach (DPO). The expression obtained has a correct form in the low momentum limit in accord with the condition first given by Gavoret and Nozières. The origin of an unphysical result found by Grest that np becomes negative for low wave numbers will be elucidated. Using the expression for np the ground-state energy is re-obtained. The result agrees completely with that given by Brueckner and Lee.


URL : http://ptp.ipap.jp/link?PTP/56/16/
DOI : 10.1143/PTP.56.16

[ Full Text PDF : FREE ACCESS (1102K) ] Citation:

References:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 57 No. 1 (1977) pp. 12-27 :
    Use of a Coherent-State Representation for a Many-Boson System at High Density
    Masakazu Tsujii and Toshiyuki Nishiyama
  2. Progress of Theoretical Physics Vol. 57 No. 2 (1977) pp. 393-409 :
    Collective Variable Approach to Many-Boson Systems at High Density
    Toshiyuki Nishiyama and Masakazu Tsujii
  3. Progress of Theoretical Physics Vol. 62 No. 5 (1979) pp. 1215-1224 :
    Momentum Distribution of a Charged Bose Gas at High Density
    Toshiyuki Nishiyama and Yoiti Watanabe
  4. Progress of Theoretical Physics Vol. 64 No. 5 (1980) pp. 1565-1576 :
    Momentum Distribution and Ground-State Energy of Liquid 4He at the Absolute Zero Temperature
    Toshiyuki Nishiyama and Yoiti Watanabe
  5. Progress of Theoretical Physics Vol. 65 No. 4 (1981) pp. 1198-1216 :
    One-Dimensional Many Boson System. I
    Shosuke Sasaki and Takeji Kebukawa
  6. Progress of Theoretical Physics Vol. 84 No. 3 (1990) pp. 420-424 :
    Condensate Fraction of a Charged Bose Gas at High Density
    Toshiyuki Nishiyama

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