Bipartite quantum channels using multipartite cluster-type entangled coherent states

TL;DR

This paper introduces a new encoding of bipartite entangled states based on multipartite cluster-type entangled coherent states and studies how amplitude damping impacts their entanglement and teleportation utility.

Contribution

It proposes a novel encoding method for bipartite entangled states from CTECSs and analyzes the effects of amplitude damping on their entanglement properties.

Findings

Entanglement duration decreases with increased redundancy under amplitude damping.

The relationship between coherent state amplitude, redundancy, and entanglement robustness is characterized.

Amplitude damping can cause sudden death of entanglement in these states.

Abstract

We propose a particular encoding for bipartite entangled states derived from multipartite cluster-type entangled coherent states (CTECSs). We investigate the effects of amplitude damping on the entanglement content of this bipartite state, as well as its usefulness as a quantum channel for teleportation. We find interesting relationships among the amplitude of the coherent states constituting the CTECSs, the number of subsystems forming the logical qubits (redundancy), and the extent to which amplitude damping affects the entanglement of the channel. For instance, in the sense of sudden death of entanglement, given a fixed value of the initial coherent state amplitude, the entanglement life span is shortened if redundancy is increased.