Quantum teleportation of spin coherent states: beyond continuous variables teleportation

TL;DR

This paper presents a quantum teleportation protocol capable of transferring macroscopic spin coherent states, like those in Bose-Einstein condensates, using simple operations, with error scaling favorably as particle number increases.

Contribution

It introduces a novel teleportation scheme for macroscopic spin states that extends beyond continuous variable methods, applicable to large quantum systems.

Findings

Error scales favorably with particle number N

Protocol works with elementary operations and measurements

Applicable to macroscopic quantum states like Bose-Einstein condensates

Abstract

We introduce a quantum teleportation scheme that can transfer a macroscopic spin coherent state between two locations. In the scheme a large number of copies of a qubit, such as realized in a coherent two-component Bose-Einstein condensate, is teleported onto a distant macroscopic spin coherent state using only elementary operations and measurements. We analyze the error of the protocol with the number of particles N in the spin coherent state under decoherence and find that it scales favorably with N.