Quantum Monte Carlo calculation of the equation of state of neutron matter

S. Gandolfi, A. Yu Illarionov, Kevin Schmidt, F. Pederiva, S. Fantoni

Research output: Contribution to journalArticle

99 Citations (Scopus)

Abstract

We calculated the equation of state of neutron matter at zero temperature by means of the auxiliary field diffusion Monte Carlo (AFDMC) method combined with a fixed-phase approximation. The calculation of the energy was carried out by simulating up to 114 neutrons in a periodic box. Special attention was given to reducing finite-size effects at the energy evaluation by adding to the interaction the effect due to the truncation of the simulation box, and by performing several simulations using different numbers of neutrons. The finite-size effects due to kinetic energy were also checked by employing the twist-averaged boundary conditions. We considered a realistic nuclear Hamiltonian containing modern two- and three-body interactions of the Argonne and Urbana family. The equation of state can be used to compare and calibrate other many-body calculations and to predict properties of neutron stars.

Original languageEnglish (US)
Article number054005
JournalPhysical Review C - Nuclear Physics
Volume79
Issue number5
DOIs
StatePublished - May 1 2009

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equations of state
neutrons
boxes
approximation
neutron stars
Monte Carlo method
simulation
kinetic energy
interactions
boundary conditions
energy
evaluation
temperature

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Quantum Monte Carlo calculation of the equation of state of neutron matter. / Gandolfi, S.; Illarionov, A. Yu; Schmidt, Kevin; Pederiva, F.; Fantoni, S.

In: Physical Review C - Nuclear Physics, Vol. 79, No. 5, 054005, 01.05.2009.

Research output: Contribution to journalArticle

Gandolfi, S. ; Illarionov, A. Yu ; Schmidt, Kevin ; Pederiva, F. ; Fantoni, S. / Quantum Monte Carlo calculation of the equation of state of neutron matter. In: Physical Review C - Nuclear Physics. 2009 ; Vol. 79, No. 5.
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