Teleportation of an arbitrary multipartite state via photonic Faraday rotation

TL;DR

This paper presents a practical, deterministic scheme for teleporting arbitrary multipartite quantum states using photonic Faraday rotation, effective in low-Q cavities and resilient to common experimental issues.

Contribution

It introduces a novel teleportation protocol leveraging Faraday rotation and virtual atomic excitation, simplifying Bell-state measurement requirements.

Findings

Works in low-Q cavities with virtual atomic excitation

Achieves deterministic teleportation of multipartite states

Reduces experimental complexity for Bell-state measurement

Abstract

We propose a practical scheme for deterministically teleporting an arbitrary multipartite state, either product or entangled, using Faraday rotation of the photonic polarization. Our scheme, based on the input-output process of single-photon pulses regarding cavities, works in low-Q cavities and only involves virtual excitation of the atoms, which is insensitive to both cavity decay and atomic spontaneous emission. Besides, the Bell-state measurement is accomplished by the Faraday rotation plus product-state measurements, which could much relax the experimental difficulty to realize the Bell-state measurement by the CNOT operation.