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- W2055735367 abstract "The ground state wave function and energy of a system of interacting bosons is studied by extending an elementary method due to Bijl and to Bogolyubov and Zubarev. Attention is focused on the real function S(x1…xN) defined by ψ = eS. S is written as a sum of intrinsic two-particle, three-particle, etc. functions. The functions are fully determined by matching intrinsic n-particle terms in the equation obeyed by S. The theory describes both close collisions and the interaction of sets of particles with the surrounding medium. Analysis of the procedure in terms of distribution functions reveals that a linearization of the generalized superposition approximation is the key feature. Excited states of the phonon roton type are found in the form ψ = FeS, with F a fully determined sum of terms of different particle numbers. The wave functions are similar to those used by Feynman and Cohen for actual liquid helium, but give a more detailed description of the excitations for the restricted situations where the theory applies." @default.
- W2055735367 created "2016-06-24" @default.
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- W2055735367 date "1962-10-01" @default.
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- W2055735367 title "Low lying states of a system of interacting bosons" @default.
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- W2055735367 doi "https://doi.org/10.1016/0003-4916(62)90115-x" @default.
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