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

S. Gandolfi, A. Yu. Illarionov, K. E. Schmidt, F. Pederiva, and S. Fantoni
Phys. Rev. C 79, 054005 – Published 18 May 2009

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.

  • Figure
  • Figure
  • Figure
  • Received 16 March 2009

DOI:https://doi.org/10.1103/PhysRevC.79.054005

©2009 American Physical Society

Authors & Affiliations

S. Gandolfi* and A. Yu. Illarionov

  • International School for Advanced Studies, SISSA Via Beirut 2/4 I-34014 Trieste, Italy and INFN, Sezione di Trieste, Trieste, Italy

K. E. Schmidt

  • Department of Physics, Arizona State University, Tempe, Arizona 85287, USA

F. Pederiva§

  • Dipartimento di Fisica dell'Universitá di Trento, via Sommarive 14, I-38050 Povo, Trento, Italy and INFN, Gruppo Collegato di Trento, Trento, Italy

S. Fantoni

  • International School for Advanced Studies, SISSA Via Beirut 2/4 I-34014 Trieste, Italy INFN, Sezione di Trieste, Trieste, Italy and INFM DEMOCRITOS National Simulation Center, Via Beirut 2/4 I-34014 Trieste, Italy

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 79, Iss. 5 — May 2009

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×