Long-distance Entanglement generation by Local Rotational Protocols in spin chains

TL;DR

This paper proposes a method to generate long-distance entanglement in spin chains by local rotations on the ground state, achieving higher entanglement than previous methods, with potential implementation in optical lattices.

Contribution

It introduces a novel protocol using local rotations on dimerized XX or XXZ spin chains to enhance entanglement between distant ends, surpassing prior approaches.

Findings

Higher entanglement achieved compared to previous methods

Protocol feasible with optical lattice technology

Effective entanglement generation over long distances

Abstract

We exploit the inherent entanglement of the ground state of a spin chain with dimerized XX or XXZ Hamiltonian to investigate the entanglement generation between the ends of the chain. We follow the strategy has been introduced in Ref. [14] to encode the information in the entangled ground state of the system by local rotation. The amount of achieved entanglement in this scheme is higher than the attaching a pair of maximally entanglement scenarios. Also, our proposal can be implemented by using the optical lattices.