Thermal decoherence of long-distance entanglement in spin-1 chains

TL;DR

This paper investigates how thermal effects cause decoherence in long-distance entanglement within spin-1 chains, revealing slow decay under certain conditions and potential applications in quantum teleportation.

Contribution

It provides an analytical derivation of the effective Hamiltonian and numerical analysis of entanglement decay, highlighting the robustness of long-distance thermal entanglement.

Findings

Decoherence of entanglement is slow with non-interacting spins.

Long-distance thermal entangled states can serve as noisy channels for quantum teleportation.

Effective coupling scaling behavior is numerically demonstrated.

Abstract

he thermal entanglement is generated by weakly interacting atoms with an isotropic spin-1 chain. The decoherence of the entanglement is mainly investigated. The effective Hamiltonian is analytically obtained by the approximation method of perturbation. The scaling behavior of the effective coupling is numerically illustrated by the exact diagonalization. It is found out that the decay of the entanglement is slow in the case of non interacting spins. The long-distance thermal entangled states can be used as the noisy channel for the achievement of the quantum teleportation.