Nuclear structure in the framework of the Unitary Correlation Operator Method
| Autor: | Hans Feldmeier, Robert Roth, Thomas Neff |
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| Rok vydání: | 2010 |
| Předmět: |
Correlation operator
Physics Nuclear and High Energy Physics Nuclear Theory SHELL model Nuclear structure FOS: Physical sciences Observable Unitary transformation Renormalization group Unitary state Nuclear Theory (nucl-th) Theoretical physics symbols.namesake symbols Hamiltonian (quantum mechanics) |
| Zdroj: | Progress in Particle and Nuclear Physics. 65:50-93 |
| ISSN: | 0146-6410 |
| Popis: | Correlations play a crucial role in the nuclear many-body problem. We give an overview of recent developments in nuclear structure theory aiming at the description of these interaction-induced correlations by unitary transformations. We focus on the Unitary Correlation Operator Method (UCOM), which offers a very intuitive, universal and robust approach for the treatment of short-range correlations. We discuss the UCOM formalism in detail and highlight the connections to other methods for the description of short-range correlations and the construction of effective interactions. In particular, we juxtapose UCOM with the Similarity Renormalization Group (SRG) approach, which implements the unitary transformation of the Hamiltonian through a very flexible flow-equation formulation. The UCOM- and SRG-transformed interactions are compared on the level of matrix elements and in many-body calculations within the no-core shell model and with Hartree-Fock plus perturbation theory for a variety of nuclei and observables. These calculations provide a detailed picture of the similarities and differences as well as the advantages and limitations of unitary transformation methods. Comment: 72 pages, 31 figures |
| Databáze: | OpenAIRE |
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