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arXiv · 2502.05071

Deterministic quantum teleportation of a path-encoded state using entangled photons

Akshai T. Krishnan·Kanad Sengupta·S. P. Dinesh·C. M. Chandrashekar
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Abstract

Quantum teleportation enables a way to transmit an arbitrary qubit state from one place to an other. A standard scheme for teleportation in optical setup involve three photons, an entangled photon pair and a photon carrying quantum state to be teleported. The interaction between the photons in the scheme makes quantum teleportation probabilistic. Here we demonstrate a deterministic teleportation of an arbitrary qubit state using only a polarization entangled photon pair in a linear optical setup. By introducing the path degree of freedom to one of the entangled photon and encoding the arbitrary qubit state into it, we demonstrate 100\% Bell State Measurement (BSM) outcome. This enables a deterministic teleportation of a qubit state in an optical scheme with high fidelity. We report an average teleportation fidelity of 88.00%. The dependency of fidelity on the visibility of single-photon interferometer used for path qubit state shows the possibility of further improving the fidelity of quantum teleportation.

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Akshai T. Krishnan, Kanad Sengupta, S. P. Dinesh, C. M. Chandrashekar. 2025-02-07. Deterministic quantum teleportation of a path-encoded state using entangled photons. https://arxiv.org/abs/2502.05071

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