### 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 language | English (US) |
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Article number | 054005 |

Journal | Physical Review C - Nuclear Physics |

Volume | 79 |

Issue number | 5 |

DOIs | |

State | Published - May 1 2009 |

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### ASJC Scopus subject areas

- Nuclear and High Energy Physics

### Cite this

*Physical Review C - Nuclear Physics*,

*79*(5), [054005]. https://doi.org/10.1103/PhysRevC.79.054005

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

Research output: Contribution to journal › Article

*Physical Review C - Nuclear Physics*, vol. 79, no. 5, 054005. https://doi.org/10.1103/PhysRevC.79.054005

}

TY - JOUR

T1 - Quantum Monte Carlo calculation of the equation of state of neutron matter

AU - Gandolfi, S.

AU - Illarionov, A. Yu

AU - Schmidt, Kevin

AU - Pederiva, F.

AU - Fantoni, S.

PY - 2009/5/1

Y1 - 2009/5/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=66349099012&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=66349099012&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.79.054005

DO - 10.1103/PhysRevC.79.054005

M3 - Article

VL - 79

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 5

M1 - 054005

ER -