ISSN:
1434-601X
Keywords:
21.60.−n
;
21.65.+f
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The coupled cluster equations first proposed by Coester and Kümmel and developed by Kümmel, Lührmann, and Zabolitsky are derived explicitly from the variational principle for the ground state energy (the “true” energy) using a new set of simple formulas relating density matrices (equal time limits of Green functions) to the coupled cluster functions. In this respect a simplification appears to be achieved by working with a normalized ground state wave function. The further transformation of the variational equations into the standard forms given by the previous authors differs mainly in its pedagogical aspects from ideas found in the existing literature.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01411985
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