Boundary conditions for star matter and other periodic fermionic systems

Abstract

Bulk fermionic matter, as it can be notably found in supernova matter and neutrons stars, is subject to correlations of infinite range due to the antisymmetrisation of the N-body wave function, which cannot be explicitly accounted for in a practical simulation. This problem is usually addressed in condensed matter physics by means of the so-called Twist Averaged Boundary Condition method. A different ansatz based on the localized Wannier representation has been proposed in the context of antisymmetrized molecular dynamics. In this paper we work out the formal relation between the two approaches. We show that, while the two coincide when working with exact eigenstates of the N-body Hamiltonian, differences appear in the case of variational approaches, which are currently used for the description of stellar matter. Some model applications with Fermionic Molecular Dynamics are shown.

References in corpus (6)

• Applications of quantum Monte Carlo methods in condensed systems
• Formation of Nuclear "Pasta" in Supernovae
• On the validity of the Wigner-Seitz approximation in neutron star crust
• Ground state properties of the one-dimensional electron liquid
• Neutron specific heat in the crust of neutron stars from the nuclear band theory
• A doubly-periodic structure for the study of inhomogeneous bulk fermion matter with spatial localizations

Cited by in corpus (4)

• Unified treatment of sub-saturation stellar matter at zero and finite temperature
• Twist-averaged boundary conditions for nuclear pasta Hartree-Fock calculations
• Time-dependent density functional theory with twist-averaged boundary conditions
• Phase transitions in partial summation methods: Results from the 3D Hubbard model