A constrained-path quantum Monte-Carlo approach for the nuclear shell model

Abstract : A new QMC approach for the shell model yielding nearly exact spectroscopy of nuclei is presented. The originality of the formalism lies in the use of a variational symmetry-restored wave function to ‘steer’ the Brownian motion, and to control the sign/phase problem that generally makes the traditional QMC samplings totally ineffective by causing a prohibitive growth of the statistical errors. Tests of convergence and proof-of-principle results are reported.
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J. Bonnard, O. Juillet. A constrained-path quantum Monte-Carlo approach for the nuclear shell model. 21st International School on Nuclear Physics and Applications & the International Symposium on Exotic Nuclei, Sep 2015, Varna, Bulgaria. pp.012004, ⟨10.1088/1742-6596/724/1/012004⟩. ⟨in2p3-01348905⟩

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