40 citations · 269 across the 15 of their papers we have counts for
15 papers
Dynamics of entanglement entropy of interacting fermions in a 1D driven harmonic trap
J. R. McKenney, W. J. Porter, J. E. Drut
Following up on a recent analysis of two cold atoms in a time-dependent harmonic trap in one dimension, we explore the entanglement entropy of two and three fermions in the same si…
Surmounting the sign problem in non-relativistic calculations: a case study with mass-imbalanced fermions
Lukas Rammelmüller, William J. Porter, Joaquín E. Drut +1
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 li…
Evolution from few- to many-body physics in one-dimensional Fermi systems: One- and two-body density matrices, and particle-partition entanglement
Lukas Rammelmüller, William J. Porter, Jens Braun +1
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 mom…
Tan's contact and the phase distribution of repulsive Fermi gases: Insights from QCD noise analyses
William J. Porter, Joaquín E. Drut
Path-integral analyses originally pioneered in the study of the complex-phase problem afflicting lattice calculations of finite-density quantum chromodynamics are generalized to no…
Thermodynamics of one-dimensional SU(4) and SU(6) fermions with attractive interactions
M. D. Hoffman, A. C. Loheac, W. J. Porter +1
Motivated by advances in the manipulation and detection of ultracold atoms with multiple internal degrees of freedom, we present a finite-temperature lattice Monte Carlo calculatio…
The entanglement spectrum and Rényi entropies of non-relativistic conformal fermions
William J. Porter, Joaquín E. Drut
We characterize non-perturbatively the Rényi entropies of degree n=2,3,4, and 5 of three-dimensional, strongly coupled many-fermion systems in the scale-invariant regime of short i…
Ground state of the two-dimensional attractive Fermi gas: essential properties from few- to many-body
L. Rammelmüller, W. J. Porter, J. E. Drut
We calculate the ground-state properties of unpolarized two-dimensional attractive fermions in the range from few to many particles. Using first-principles lattice Monte Carlo meth…
Hard-Wall and Non-Uniform Lattice Monte Carlo Approaches to One-Dimensional Fermi Gases in a Harmonic Trap
Casey E. Berger, Joaquín E. Drut, William J. Porter
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 co…
Entanglement of Free Fermions and Bosons at Finite Temperature
Joaquín E. Drut, William J. Porter
We generalize techniques previously used to compute ground-state properties of one-dimensional noninteracting quantum gases to obtain exact results at finite temperature. We comput…
Ground-state energy, density profiles, and momentum distribution of attractively interacting 1D Fermi gases with hard-wall boundaries: a Monte Carlo study
J. R. McKenney, C. R. Shill, W. J. Porter +1
Motivated by the realization of hard-wall boundary conditions in experiments with ultracold atoms, we investigate the ground-state properties of spin-1/2 fermions with attractive i…
Entanglement, noise, and the cumulant expansion
Joaquín E. Drut, William J. Porter
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…
A hybrid Monte Carlo approach to the entanglement entropy of interacting fermions
Joaquín E. Drut, William J. Porter
The Monte Carlo calculation of Rényi entanglement entropies of interacting fermions suffers from a well-known signal-to-noise problem, even for a large number of situation…
Few-fermion systems in one dimension: Ground- and excited-state energies and contacts
L. Rammelmüller, W. J. Porter, A. C. Loheac +1
Using the lattice Monte Carlo method, we compute the energy and Tan's contact in the ground state as well as the first excited state of few- to many-fermion systems in a one-dimens…
Universality in one-dimensional fermions at finite temperature: Density, pressure, compressibility, and contact
M. D. Hoffman, P. D. Javernick, A. C. Loheac +3
We present finite-temperature, lattice Monte Carlo calculations of the particle number density, compressibility, pressure, and Tan's contact of an unpolarized system of short-range…
Convexity of the entanglement energy of SU()-symmetric fermions with attractive interactions
Joaquín E. Drut, William J. Porter
The positivity of the probability measure of attractively interacting systems of -component fermions enables the derivation of an exact convexity property for the ground-state…