Quantum teleportation of unknown qubit beyond Bell states formalism

TL;DR

This paper proposes a nearly deterministic quantum teleportation protocol for unknown qubits using hybrid entangled states beyond Bell states, with strategies to improve fidelity and applicability to various states.

Contribution

It introduces a novel teleportation scheme utilizing hybrid entangled states and linear optics, extending beyond traditional Bell state formalism.

Findings

Protocol achieves near-deterministic teleportation.

Fidelity can be improved with specific strategies.

Applicable to various number states of qubits.

Abstract

We suggest implementation of quantum teleportation protocol of unknown qubit beyond Bell states formalism. Hybrid entangled state composed of coherent components that belong to Alice and dual-rail single photon at Bob disposal is used. Nonlinear effect on the teleported state is realized due to peculiarity of interaction of coherent components with discrete variable state on a beam splitter. Bob performs unitary transformation after receiving the appropriate classical information. The protocol is nearly deterministic but the output state is subject to amplitude distortion which reduces the fidelity of the protocol. Final problem is reduced to finding a way to get rid of amplitude-distorting factor to restore the original qubit. Some strategies to increase the fidelity of the protocol are used. We show the teleportation can be implemented with arbitrary settings. Our approach is applicable to different basic number states of original unknown qubit. The scheme is realized by linear optics methods and requires an irreducible number of optical elements.