Green's function method with energy-independent vertex functions
dc.contributor.author | Tsay Tzeng S.Y. | |
dc.contributor.author | Kuo T.T.S. | |
dc.contributor.author | Tzeng Y. | |
dc.contributor.author | Geyer H.B. | |
dc.contributor.author | Navratil P. | |
dc.date.accessioned | 2011-05-15T15:54:09Z | |
dc.date.available | 2011-05-15T15:54:09Z | |
dc.date.issued | 1996 | |
dc.description.abstract | In conventional Green's function methods the vertex function T is generally energy dependent. However, a model-space Green's function method where the vertex function is manifestly energy independent can be formulated using energy-independent effective interaction theories based on folded diagrams and/or similarity transformations. This is discussed in general and then illustrated for a 1p1h model-space Green's function applied to a solvable Lipkin many-fermion model. The poles of the conventional Green's function are obtained by solving a self-consistent Dyson equation and model space calculations may lead to unphysical poles. For the energy-independent model-space Green's function only the physical poles of the model problem are reproduced and are in satisfactory agreement with the exact excitation energies. | |
dc.description.version | Article | |
dc.identifier.citation | Physical Review C - Nuclear Physics | |
dc.identifier.citation | 53 | |
dc.identifier.citation | 3 | |
dc.identifier.issn | 5562813 | |
dc.identifier.other | 10.1103/PhysRevC.53.1249 | |
dc.identifier.uri | http://hdl.handle.net/10019.1/9022 | |
dc.title | Green's function method with energy-independent vertex functions | |
dc.type | Article |