Entanglement generation in spatially separated systems using quantum walk

TL;DR

This paper proposes a new method to generate entanglement between distant systems by utilizing spatial entanglement from a single-particle quantum walk, with controllable dynamics enhancing entanglement quality.

Contribution

It introduces a scheme leveraging quantum walk-generated spatial entanglement to entangle arbitrary distant systems, with tunable walk dynamics for improved entanglement output.

Findings

Quantum walk can generate spatial entanglement suitable for distant system entanglement.

Controlling quantum walk dynamics enhances entanglement strength.

The scheme is versatile for different systems interacting with spatial modes.

Abstract

We present a novel scheme to generate entanglement between two spatially separated systems. The scheme makes use of spatial entanglement generated by a single-particle quantum walk which is used to entangle two spatially separated, not necessarily correlated, systems. This scheme can be used to entangle any two systems which can interact with the spatial modes entangled during the quantum walk evolution. A notable feature is that we can control the quantum walk dynamics and its ability to localize leads to a substantial control and improvement in the entanglement output.