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- W2187368561 abstract "We propose a novel extension of the standard quasiparticle random phase approximation (QRPA) with a new form of phonon operator, which allows to describe also states of multiphonon origin. We denote this method as QRPA with non-linear phonon operator (nlQRPA) and apply it to the proton-neutron Lipkin model. We consider the simplest non-linear extension of a phonon operator where the RPA equation can be transformed into a standard form. That guarantees the orthonormality and completeness of the QRPA states of one-phonon and three-phonon origin. A rather good agreement is found both for energies and beta transition amplitudes with those obtained by a diagonalization of the schematic Hamiltonian. There is straightforward way to extend this approach also for a realistic nuclear structure calculations." @default.
- W2187368561 created "2016-06-24" @default.
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- W2187368561 date "2015-01-01" @default.
- W2187368561 modified "2023-10-15" @default.
- W2187368561 title "QRPA for description of states of multiphonon origin" @default.
- W2187368561 cites W1983324263 @default.
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- W2187368561 doi "https://doi.org/10.1063/1.4934911" @default.
- W2187368561 hasPublicationYear "2015" @default.
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