Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Porter, William J"'
Publikováno v:
Phys. Rev. D 96, 094506 (2017)
The calculation of the ground state and thermodynamics of mass-imbalanced Fermi systems is a challenging many-body problem. Even in one spatial dimension, analytic solutions are limited to special configurations and numerical progress with standard M
Externí odkaz:
http://arxiv.org/abs/1708.03149
Publikováno v:
Phys. Rev. A 96, 033635 (2017)
We study the evolution from few- to many-body physics of fermionic systems in one spatial dimension with attractive pairwise interactions. We determine the detailed form of the momentum distribution, the structure of the one-body density matrix, and
Externí odkaz:
http://arxiv.org/abs/1706.00031
Autor:
Porter, William J., Drut, Joaquín E.
Publikováno v:
Phys. Rev. A 95, 053619 (2017)
Path-integral analyses originally pioneered in the study of the complex-phase problem afflicting lattice calculations of finite-density quantum chromodynamics are generalized to non-relativistic Fermi gases with repulsive interactions. Using argument
Externí odkaz:
http://arxiv.org/abs/1609.09401
Autor:
Porter, William J., Drut, Joaquín E.
Publikováno v:
Phys. Rev. B 94, 165112 (2016)
We characterize non-perturbatively the R\'enyi entropies of degree n=2,3,4, and 5 of three-dimensional, strongly coupled many-fermion systems in the scale-invariant regime of short interaction range and large scattering length, i.e. in the unitary li
Externí odkaz:
http://arxiv.org/abs/1605.07085
Publikováno v:
Computer Physics Communications, Volume 208, November 2016, Pages 103-108
We present in detail two variants of the lattice Monte Carlo method aimed at tackling systems in external trapping potentials: a uniform-lattice approach with hard-wall boundary conditions, and a non-uniform Gauss-Hermite lattice approach. Using thos
Externí odkaz:
http://arxiv.org/abs/1510.02976
Autor:
Drut, Joaquín E., Porter, William J.
Publikováno v:
J. Phys. A, 50, 145304 (2017)
We generalize techniques previously used to compute ground-state properties of one-dimensional noninteracting quantum gases to obtain exact results at finite temperature. We compute the order-n R\'enyi entanglement entropy to all orders in the fugaci
Externí odkaz:
http://arxiv.org/abs/1510.01723
Autor:
Drut, Joaquín E., Porter, William J.
Publikováno v:
Phys. Rev. E 93, 043301 (2016)
We put forward a simpler and improved variation of a recently proposed method to overcome the signal-to-noise problem found in Monte Carlo calculations of the entanglement entropy of interacting fermions. The present method takes advantage of the app
Externí odkaz:
http://arxiv.org/abs/1508.04375
Autor:
Drut, Joaquín E., Porter, William J.
Publikováno v:
Phys. Rev. B 92, 125126 (2015)
The Monte Carlo calculation of R\'enyi entanglement entropies $S^{}_n$ of interacting fermions suffers from a well-known signal-to-noise problem, even for a large number of situations in which the infamous sign problem is absent. A few methods have b
Externí odkaz:
http://arxiv.org/abs/1506.06654
Autor:
Drut, Joaquín E., Porter, William J.
Publikováno v:
Phys. Rev. Lett. 114, 050402 (2015)
The positivity of the probability measure of attractively interacting systems of $2N$-component fermions enables the derivation of an exact convexity property for the ground-state energy of such systems. Using analogous arguments, applied to path-int
Externí odkaz:
http://arxiv.org/abs/1410.0654
Publikováno v:
In Computer Physics Communications November 2016 208:103-108
