TU Darmstadt / ULB / TUbiblio

Matrix elements and few-body calculations within the unitary correlation operator method

Roth, R. and Hergert, H. and Papakonstantinou, P. and Neff, T. and Feldmeier, H. (2005):
Matrix elements and few-body calculations within the unitary correlation operator method.
In: Physical Review C, American Physical Society, pp. 034002, 72, (3), ISSN 0556-2813,
[Online-Edition: http://dx.doi.org/10.1103/PhysRevC.72.034002],
[Article]

Item Type: Article
Erschienen: 2005
Creators: Roth, R. and Hergert, H. and Papakonstantinou, P. and Neff, T. and Feldmeier, H.
Title: Matrix elements and few-body calculations within the unitary correlation operator method
Language: English
Journal or Publication Title: Physical Review C
Volume: 72
Number: 3
Publisher: American Physical Society
Divisions: DFG-Collaborative Research Centres (incl. Transregio)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
05 Department of Physics
05 Department of Physics > Institute of Nuclear Physics
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC) > D: Theoretische Kernstrukturphysik
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC) > D: Theoretische Kernstrukturphysik > D1: Theoretische Kernstrukturphysik
Date Deposited: 20 Jun 2011 07:12
Official URL: http://dx.doi.org/10.1103/PhysRevC.72.034002
Identification Number: doi:10.1103/PhysRevC.72.034002
Alternative Abstract:
Alternative abstract Language
We employ the unitary correlation operator method (UCOM) to construct correlated, low-momentum matrix elements of realistic nucleon-nucleon interactions. The dominant short-range central and tensor correlations induced by the interaction are included explicitly by an unitary transformation. Using correlated momentum-space matrix elements of the Argonne V18 potential, we show that the unitary transformation eliminates the strong off-diagonal contributions caused by the short-range repulsion and the tensor interaction and leaves a correlated interaction dominated by low-momentum contributions. We use correlated harmonic oscillator matrix elements as input for no-core shell model calculations for few-nucleon systems. Compared to the bare interaction, the convergence properties are dramatically improved. The bulk of the binding energy can already be obtained in very small model spaces or even with a single Slater determinant. Residual long-range correlations, not treated explicitly by the unitary transformation, can easily be described in model spaces of moderate size allowing for fast convergence. By varying the range of the tensor correlator we are able to map out the Tjon line and can in turn constrain the optimal correlator ranges.English
Export:
Suche nach Titel in: TUfind oder in Google

Optionen (nur für Redakteure)

View Item View Item