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- W2019919372 abstract "A perturbation theory approximation is applied to the many-boson problem to obtain a parametric trial pair function similar to that derived by Jastrow. The major contribution to the ground state energy from single pair excitations is evaluated by a direct calculation in configuration space. This treatment is similar to the direct evaluation of the second virial coefficient for imperfect gases. The perturbation theory connection is shown at an early stage before the full formalism of the cluster development is introduced. This serves to motivate the general method of cluster integrals that may be so treated to be completely equivalent to the perturbation theory in the approximation of pair excitations." @default.
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- W2019919372 modified "2023-10-06" @default.
- W2019919372 title "Theory of Many-Boson Systems" @default.
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