Spatial entanglement using a quantum walk on a many-body system

TL;DR

This paper investigates how a quantum walk on a many-particle lattice system can generate and control spatial entanglement, with potential applications in quantum information processing.

Contribution

It demonstrates the dependence of spatial entanglement on quantum walk parameters and shows how to optimize entanglement in many-particle systems.

Findings

Spatial entanglement increases with the number of steps in the quantum walk.

Entanglement depends on the quantum coin operation parameters.

Control over entanglement is achievable through system parameter tuning.

Abstract

The evolution of a many-particle system on a one-dimensional lattice, subjected to a quantum walk can cause spatial entanglement in the lattice position, which can be exploited for quantum information/communication purposes. We demonstrate the evolution of spatial entanglement and its dependence on the quantum coin operation parameters, the number of particles present in the lattice and the number of steps of quantum walk on the system. Thus, spatial entanglement can be controlled and optimized using a many-particle discrete-time quantum walk.