Verifying a quasi-classical spin model of perturbed quantum rewinding in a Fermi gas

TL;DR

This paper tests a quasi-classical spin model against a Fermi gas experiment involving perturbed quantum rewinding, demonstrating quantitative agreement and exploring RF detuning effects to improve correlation measurements.

Contribution

It provides the first systematic validation of a quasi-classical spin model for a Fermi gas under quantum rewinding, highlighting its accuracy and potential for new measurement techniques.

Findings

Model agrees quantitatively with experimental data

RF detunings significantly affect system dynamics

Method enables new correlation measurement approaches

Abstract

We systematically test a quasi-classical spin model of a large spin-lattice in energy space, with a tunable, reversible Hamiltonian and effective long-range interactions. The system is simulated by a weakly interacting Fermi gas undergoing perturbed quantum rewinding using radio-frequency(RF) pulses. The model reported here is found to be in a quantitative agreement with measurements of the ensemble-averaged energy-resolved spin density. This work elucidates the effects of RF detunings on the system and measurements, pointing the way to new correlation measurement methods.