Article
Number conserving particle-hole RPA for superfluid nuclei
Author/s | Dukelsky, Jorge
García Ramos, José Enrique Arias Carrasco, José Miguel Pérez Fernández, Pedro Schuck, P. |
Department | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear Universidad de Sevilla. Departamento de Física Aplicada III |
Publication Date | 2019-08 |
Deposit Date | 2019-08-16 |
Published in |
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Abstract | We present a number conserving particle-hole RPA theory for collective excitations in the transition from normal to superfluid nuclei. The method derives from an RPA theory developed long ago in quantum chemistry using ... We present a number conserving particle-hole RPA theory for collective excitations in the transition from normal to superfluid nuclei. The method derives from an RPA theory developed long ago in quantum chemistry using antisymmetric geminal powers, or equivalently number projected HFB states, as reference states. We show within a minimal model of pairing plus monopole interactions that the number conserving particle-hole RPA excitations evolve smoothly across the superfluid phase transition close to the exact results, contrary to particle-hole RPA in the normal phase and quasiparticle RPA in the superfluid phase that require a change of basis at the broken symmetry point. The new formalism can be applied in a straightforward manner to study particle-hole excitations on top of a number projected HFB state. |
Project ID. | SOMM17/6105/UGR
FIS2015-63770-P FIS2017-88410-P PGC2018-094180-B-I00 UNHU-15CE-2848 |
Citation | Dukelsky, J., García Ramos, J.E., Arias Carrasco, J.M., Pérez Fernández, P. y Schuck, P. (2019). Number conserving particle-hole RPA for superfluid nuclei. Physics Letters B, 795 (August 2019), 537-541. |
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