Extended RPA with ground-state correlations
Kyorin University School of Medicine, 181-8611, Mitaka, Tokyo, Japan
2 Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, F-91406, Orsay Cedex, France
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We propose a time-independent method for finding a correlated ground state of an extended time-dependent Hartree-Fock theory, known as the time-dependent density matrix theory (TDDM). The correlated ground state is used to formulate the small amplitude limit of TDDM (STDDM) which is a version of extended RPA theories with ground-state correlations. To demonstrate the feasibility of the method, we calculate the ground state of 22 O and study the first 2 + state and its two-phonon states using STDDM.
© Società Italiana di Fisica and Springer-Verlag, 2004