Higher-order corrections to collective particle-hole excitations using green function techniques

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18 Citations (Scopus)

Abstract

Using Green function techniques, we determine higher-order corrections to the Tamm-Dancoff and Random Phase Approximation equations. In particular, we find that the second-order corrections to the Tamm-Dancoff equations consist of a t-matrix term and a core-polarization term. If we truncate our configuration space, we obtain an additional second-order correction from the particle-hole ladder term. We carry out numerical calculations of these second-order corrections for the negative-parity excited states of 4He using the Tabakin separable potential.

Original languageEnglish (US)
Pages (from-to)129-145
Number of pages17
JournalNuclear Physics, Section A
Volume109
Issue number1
StatePublished - Feb 19 1968
Externally publishedYes

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Green's functions
excitation
ladders
parity
polarization
matrices
configurations
approximation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Higher-order corrections to collective particle-hole excitations using green function techniques. / Barrett, Bruce R.

In: Nuclear Physics, Section A, Vol. 109, No. 1, 19.02.1968, p. 129-145.

Research output: Contribution to journalArticle

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