An ab-initio approach to pairing phenomena using modern effective interactions [Elektronische Ressource] / von Heiko Hergert

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An Ab-Initio ApproachtoPairingPhenomenaUsingModernEffectiveInteractionsVom Fachbereich Physikder Technischen Universit¨ at Darmstadtzur Erlangung des Gradeseines Doktors der Naturwissenschaften(Dr. rer. nat.)genehmigte Dissertation vonDipl.-Phys. Heiko Hergertaus Budingen¨Darmstadt 2008D17Referent: Prof. Dr. R. RothKorreferent: Prof. Dr. J. WambachTag der Einreichung: 15. 01. 2008Tag der Prufung:¨ 08. 02. 2008AbstractThe Unitary Correlation Operator Method (UCOM) and the Similarity RenormalizationGroup (SRG) allow the derivation of ‘tamed’ phase-shift equivalent nucleon-nucleoninteractions which are a suitable starting point for a wide array of many-body methods,from simple mean-field approaches like Hartree-Fock to the exact No-Core Shell Model.While the UCOM and the SRG are conceptually very different, we explicitly showthat the generators of both types of unitary transformations have the same structure,and therefore treat the same kind of physics, i.e., the short-range central and tensorcorrelations induced by realistic nucleon-nucleon interactions.Mean-field calculations with the correlated interaction V yield bound nucleiUCOMover the whole mass chart, and by including long-range correlations which are notexplicitly described by the UCOM transformation in many-body perturbation theory,very good agreement with experimental binding energies is achieved.

Sujets

• Physik

Informations

• Publié par: technischen_universitat_darmstadt
• Publié le: 01 janvier 2008
• Nombre de lectures: 20
• Langue: English
• Poids de l'ouvrage: 2 Mo

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