Particle-hole entanglement of ultracold atoms in an optical lattice

TL;DR

This paper investigates particle-hole entanglement in a one-dimensional optical lattice with two-component bosonic atoms, demonstrating how external fields induce localized states and quantum correlations, with implications for quantum information processing.

Contribution

It introduces a method to generate and analyze particle-hole entanglement in ultracold atoms within optical lattices, highlighting the role of external fields and entanglement entropy.

Findings

Large particle-hole entanglement in the ground state

Particle-hole quantum correlations detectable via two-site parity

Transport properties of low-lying excited states analyzed

Abstract

We study the ground state of two-component bosonic atoms in a one-dimensional optical lattice. By applying an external field to the atoms at one end of lattice, the atoms are transported and becomes localized at that site. The holes are then created in the remaining sites. The particle-hole superpositions are produced in this process. We investigate the entanglement entropy between the atoms in the two different parts of a lattice. A large degree of particle-hole entanglement is generated in the ground state. The particle-hole quantum correlations can be probed by the two-site parity correlation functions. The transport properties of the low-lying excited states are also discussed.