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The ground-state three-body correlation function in a dilute boson gas with hard-sphere interaction

Трехчастичная корреляционная функция основного состояния в раэреженном боэонном гаэе с вэаимодействием твердых щаров

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Il Nuovo Cimento B (1965-1970)

Summary

In this paper the ground-state three-body correlation function for a hard-sphere boson gas is evaluated first with the Lee, Huang and Yang wavefunction by means of a cluster expansion, and then with the exact two-body pseudopotential of Luban. The results so obtained are compared with a previous calculation and discussed chiefly with regard to the influence of the two-body pseudopotential on the wave function of the system. It results in particular that a modification of the pseudopotential within the hard core gives significant modification of the wave function.

Riassunto

In questo lavoro si valuta la funzione di correlazione a tre corpi per lo stato fondamentale di un gas di sfere rigide, dapprima sulla base della funzione d’onda di Lee, Huang e Yang per mezzo di uno sviluppo ad ammassi, e poi usando lo pseudopotenziale esatto a due corpi di Luban. I risultati così ottenuti sono paragonati con quelli di un calcolo precedente e viene discussa l’influenza della forma dello pseudopotenziale a due corpi sulla funzione d’onda del sistema. Risulta in particolare che una modifica dello pseudopotenziale dentro un nocciolo rigido cambia in modo fisicamente significativo la funzione d’onda del sistema.

Реэюме

В зтой статье вычисляется трехчастичная корреляционная функция основного состояния для боэонного гаэа твердых щаров, сначала с волновой функцией Ли, Хуанга и Янга, с помошью кластерного раэложения, а эатем с точным двухчастичным псевдопотенциалом Лубана. Реэультаты, полученные укаэанным способом, сравниваются с предыдушим вычислением и вкратце обсуждаются в отнощении влияния двухчастичного потенциала на волновую системы. В частности, зто приводит, что модификация псевдопотенциала внутри твердого остова дает эначительное иэменение волновой функции.

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Research sponsored in part by the King Gustaf VI Adolf’s 70-Years Found for Swedish Culture, Knut and Alice Wallenberg’s Foundation, and the Aerospace Research Laboratories, OAR, through the European Office of Aerospace Research (OAR) United States Air Force.

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Bocchieri, P., Orzalesi, C.A. & Smith, V.H. The ground-state three-body correlation function in a dilute boson gas with hard-sphere interaction. Nuovo Cimento B (1965-1970) 52, 18–27 (1967). https://doi.org/10.1007/BF02710650

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