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HK: Fachverband Physik der Hadronen und Kerne

HK 34: Postersitzung

HK 34.71: Poster

Donnerstag, 13. März 2008, 14:00–16:00, Poster C3

The Unitary Correlation Operator Method from a Similarity Renormalization Group Perspective — •Sabine Reinhardt, Heiko Hergert, and Robert Roth — Institut f. Kernphysik, TU Darmstadt

We present the Similarity Renormalization Group (SRG) as a tool for constructing phase-shift equivalent effective nucleon-nucleon interactions. On a formal level we demonstrate that the SRG evolution equation leads to generators of the same structure as used within the Unitary Correlation Operator Method (UCOM). Momentum-space matrix elements of the transformed interactions in both approaches confirm this correspondence.

On the basis of this analogy we use SRG-evolved interactions for the construction of UCOM correlation functions via a mapping of the evolved states onto the initial states. These SRG-based correlators exhibit superior convergence properties in No-Core Shell-Model calculations for light nuclei and provide a realistic description of binding energies of heavier nuclei.

Work supported by the DFG (SFB 634).