Measures of complexity and entanglement in many-fermion systems

A Bulgac, M Kafker, I Abdurrahman - Physical Review C, 2023 - APS
There is no unique and widely accepted definition of the complexity measure (CM) of a
many-fermion wave function in the presence of interactions. The simplest many-fermion …

Fermi-to-Bose crossover in a trapped quasi-2D gas of fermionic atoms

AV Turlapov, MY Kagan - Journal of Physics: Condensed Matter, 2017 - iopscience.iop.org
The physics of many-body systems where particles are restricted to move in two spatial
dimensions is challenging and even controversial: on one hand, neither long-range order …

Equation of state of ultracold fermions in the 2D BEC-BCS crossover region

I Boettcher, L Bayha, D Kedar, PA Murthy, M Neidig… - Physical review …, 2016 - APS
We report the experimental measurement of the equation of state of a two-dimensional
Fermi gas with attractive s-wave interactions throughout the crossover from a weakly …

Entanglement entropy, single-particle occupation probabilities, and short-range correlations

A Bulgac - Physical Review C, 2023 - APS
For quantum many-body systems with short-range correlations (SRCs), the intimate
relationship between their magnitude, the behavior of the single-particle occupation …

Thermodynamics of an attractive 2D Fermi gas

K Fenech, P Dyke, T Peppler, MG Lingham, S Hoinka… - Physical review …, 2016 - APS
Thermodynamic properties of matter are conveniently expressed as functional relations
between variables known as equations of state. Here we experimentally determine the …

Quantum fluctuations in the BCS-BEC crossover of two-dimensional Fermi gases

L He, H Lü, G Cao, H Hu, XJ Liu - Physical Review A, 2015 - APS
We present a theoretical study of the ground state of the BCS-BEC crossover in dilute two-
dimensional Fermi gases. While the mean-field theory provides a simple and analytical …

Quantum anomaly and 2D-3D crossover in strongly interacting Fermi gases

T Peppler, P Dyke, M Zamorano, I Herrera, S Hoinka… - Physical review …, 2018 - APS
We present an experimental investigation of collective oscillations in harmonically trapped
Fermi gases through the crossover from two to three dimensions. Specifically, we measure …

Quantum anomaly and thermodynamics of one-dimensional fermions with three-body interactions

JE Drut, JR McKenney, WS Daza, CL Lin… - Physical Review Letters, 2018 - APS
We show that a system of three species of one-dimensional fermions, with an attractive three-
body contact interaction, features a scale anomaly directly related to the anomaly of two …

Harmonically trapped fermions in one dimension: A finite-temperature lattice Monte Carlo study

F Attanasio, M Bauer, R Kapust, JM Pawlowski - Physical Review A, 2024 - APS
We study a one-dimensional two-component Fermi gas in a harmonic trap** potential
using finite-temperature lattice quantum Monte Carlo methods. We are able to compute …

Concept of a contact spectrum and its applications in atomic quantum Hall states

M He, S Zhang, HM Chan, Q Zhou - Physical Review Letters, 2016 - APS
A unique feature of ultracold atoms is the separation of length scales, r 0≪ k F-1, where k F
and r 0 are the Fermi momentum characterizing the average particle distance and the range …