Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines nucl-th
Date Mercredi 8 Mars 2017
Heure 11:30
Institut IPN
Salle IPN, Bâtiment 100, salle A 015
Nom de l'orateur Bonnard
Prenom de l'orateur Jeremy
Addresse email de l'orateur
Institution de l'orateur IPN Orsay
Titre Constrained-Path Quantum Monte-Carlo Approach for the Nuclear Shell Model
Résumé The interacting shell model is a powerful theoretical framework for studying the nuclear structure. Unfortunately, the combinatorial scaling of the many-body space with the number of valence nucleons or the size of the single-particle basis strongly restricts its applicability. Quantum Monte-Carlo (QMC) methods may then be considered as attractive techniques to overcome such limitations by offering an alternative to the diagonalization of the Hamiltonian. In this context, I will present a new QMC approach for the shell model yielding nearly exact spectroscopies of nuclei. The originality of the formalism lies in the use of a variational symmetry-restored wave function to 'guide' the Brownian motion, as well as to control the sign/phase problem that generally makes the traditional QMC samplings totally ineffective by causing a prohibitive growth of the statistical errors. [1] J. Bonnard & O. Juillet, Phys. Rev. Lett. 111, 012502 (2013). [2] J. Bonnard & O. Juillet, Eur. Phys. J. A 52, 110 (2016). [3] O. Juillet, A. Leprévost, J. Bonnard, & R. Frésard, cond-mat/1610.08022 (2016).
Numéro de preprint arXiv
Commentaires $$
Fichiers attachés
  • 2017_03_08_J_Bonnard.pdf (216953 bytes) OPEN

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