Dissipative Dynamics Of Fermion-Fermion Scattering In A Three-Site Optical Lattice

TL;DR

This paper studies the dissipative behavior of fermions in a three-site optical lattice, revealing spin exchange and entanglement phenomena that could enable quantum cryptography and information transport.

Contribution

It introduces a detailed analysis of fermionic dissipative dynamics in a multi-site optical lattice, highlighting quantum correlations and potential cryptographic applications.

Findings

Spin exchange observed among lattice sites

Entanglement among particles detected

Potential for quantum cryptography demonstrated

Abstract

In this article, we investigate the dissipative dynamics of a Fermi gas trapped in a three-site optical lattice exposed to a fermionic environment. The lattice sites admit at most one spin-up and one spin-down particle at a time and its interaction with the fermionic environment cause particles to either be trapped by or expelled from it. It is then shown that apart from each lattice site being populated by at least one particle, spin exchange is observed, which allows the possibility for the system to be used to encrypt information via quantum cryptography. Furthermore, we also observe entanglement among the lattice sites, denoting that transport of quantum information among particles is possible in this ultracold atomic system.