Green's function method with energy-independent vertex functions

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dc.contributor.authorTsay Tzeng S.Y.
dc.contributor.authorKuo T.T.S.
dc.contributor.authorTzeng Y.
dc.contributor.authorGeyer H.B.
dc.contributor.authorNavratil P.
dc.date.accessioned2011-05-15T15:54:09Z
dc.date.available2011-05-15T15:54:09Z
dc.date.issued1996
dc.description.abstractIn 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.versionArticle
dc.identifier.citationPhysical Review C - Nuclear Physics
dc.identifier.citation53
dc.identifier.citation3
dc.identifier.issn5562813
dc.identifier.other10.1103/PhysRevC.53.1249
dc.identifier.urihttp://hdl.handle.net/10019.1/9022
dc.titleGreen's function method with energy-independent vertex functions
dc.typeArticle
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