Quasiparticle random-phase approximation with an optimal ground state

Authors: Simkovic, F.1; Smotlk, M.1; Raduta, A.A.2

Source: Journal of Physics G: Nuclear and Particle Physics, Volume 27, Number 8, 2001 , pp. 1757-1765(9)

Publisher: IOP Publishing

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Abstract:

A new quasiparticle random-phase approximation approach (QRPA) is presented. The corresponding ground state is variationally determined and exhibits a minimum energy. New solutions for the ground state, some with spontaneously broken symmetry, of a solvable Hamiltonian are found. A non-iterative procedure to solve the nonlinear QRPA equations is used and thus all possible solutions are found. These are compared with the exact results as well as with the solutions provided by other approaches.

Document Type: Miscellaneous

Affiliations: 1: Department of Nuclear Physics, Comenius University, Mlynsk√° dol., pav. F1, SK-842 15 Bratislava, Slovakia 2: Institute of Physics and Nuclear Engineering, Bucharest, POB MG6, Romania and Department of Theoretical Physics and Mathematics, Bucharest University, POB MG11, Romania

Publication date: January 1, 2001

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