Statut | Confirmé |
Série | NUC-THEO |
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 | $$ |
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