Quasidegenerate variational perturbation theory and the calculation of first‐order properties from variational perturbation theory wave functions
نویسندگان
چکیده
منابع مشابه
Variational Perturbation Theory for Density Matrices
Variational perturbation theory [1,2] transforms divergent perturbation expansions into convergent ones. The convergence extends to infinitely strong couplings [3], a property which has recently been used to derive critical exponents in field theory without renormalization group methods [4,5]. The theory has first been developed in quantum mechanics for the path integral representation of the f...
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ژورنال
عنوان ژورنال: The Journal of Chemical Physics
سال: 1988
ISSN: 0021-9606,1089-7690
DOI: 10.1063/1.455354