Information transfer using a single particle path-spin hybrid entangled state

TL;DR

This paper demonstrates a protocol for transferring an unknown qubit state using a single particle’s path-spin hybrid entangled state, showcasing intraparticle entanglement as a resource for quantum information transfer.

Contribution

It introduces a novel protocol utilizing single-particle hybrid entanglement for quantum state transfer, expanding the applications of intraparticle entanglement.

Findings

Successful transfer of unknown qubit states demonstrated.

Protocol relies on unitary operations, spin measurements, and classical communication.

Shows intraparticle entanglement can be used for information transfer.

Abstract

The path-spin entangled state of a single spin-1/2 particle is considered which is generated by using a beam-spitter and a spin-flipper. Using this hybrid entanglement at the level of a single particle as a resource, we formulate a protocol for transferring of the state of an unknown qubit to a distant location. Our scheme is implemented by a sequence of unitary operations along with suitable spin-measurements, as well as by using classical communication between the two spatially separated parties. This protocol, thus, demonstrates the possibility of using intraparticle entanglement as a physical resource for performing information theoretic tasks.