A Constrained-Path Quantum Monte-Carlo Approach for the Nuclear Shell Model

Autor:	Bonnard, Jérémy, Juillet, Olivier
Rok vydání:	2013
Předmět:	Nuclear Theory
Zdroj:	Phys. Rev. Lett. 111, 012502 (2013)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.111.012502
Popis:	A new Quantum Monte-Carlo (QMC) approach is proposed to investigate low-lying states of nuclei within the shell model. The formalism relies on a variational symmetry-restored wave-function to guide the underlying Brownian motion. Sign/phase problems that usually plague QMC fermionic simulations are controlled by constraining stochastic paths through a fixed-node like approximation. Exploratory results in the sd and pf valence spaces with realistic effective interactions are presented. They prove the ability of the scheme to yield nearly exact yrast spectroscopies for both even- and odd-mass nuclei. Comment: 5 pages, 2 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1303.6778 Zobrazit plný text záznamu View this record from Arxiv