Three-photon states for quantum teleportation

Kehui Song, Weijun Zhang

Xiao‐Min Hu, Chao Zhang, Bi‐Heng Liu +8 more

Quantum teleportation provides a way to transmit unknown quantum states from one location to another. In the quantum world, multilevel systems which enable high-dimensional systems are more prevalent. Therefore, to completely rebuild the quantum states of a single particle remotely, one needs to teleport multilevel (high-dimensional) states. Here, we demonstrate the teleportation of high-dimensional states in a three-dimensional six-photon system. We exploit the spatial mode of a single photon as the high-dimensional system, use two auxiliary entangled photons to realize a deterministic three-dimensional Bell state measurement. The fidelity of teleportation process matrix is F=0.596±0.037. Through this process matrix, we can prove that our teleportation is both nonclassical and genuine three dimensional. Our work paves the way to rebuild complex quantum systems remotely and to construct complex quantum networks.

Nicolás Brehm, Katrin Kroeger, Natascha Hedrich

Akshai T. Krishnan, Kanad Sengupta, S. P. Dinesh +1 more

Abstract Quantum teleportation enables a way to transmit an arbitrary qubit state from one location to another. The standard scheme for teleportation in optical setups involves three photons: an entangled photon pair and a photon carrying the quantum state to be teleported. The interaction between photons in such schemes makes quantum teleportation probabilistic. Here, we demonstrate a novel scheme for deterministic quantum 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 (DOF) to one of the entangled photons and encoding the arbitrary qubit state into it, we achieve complete Bell state discrimination within our measurement strategy. This enables deterministic teleportation of a qubit state in an optical scheme with high fidelity. We report an average teleportation fidelity of $0.88 \pm 0.04$ 0.88 ± 0.04 . The dependence of fidelity on the visibility of single-photon interference used in our scheme highlights the possibility of further improving the teleportation fidelity.

Xi‐Lin Wang, Xin-Dong Cai, Zu-En Su +6 more

Xiu Xiao-min

Quantum teleportation has important applications in quantum computation and quantum communication.Two protocols for transmitting an unknown single-photon state and an unknown non-maximally entangled EPR state are presented by using the three-photon state via collective rotation noise channel.The protocols can also be generalized to teleport multi-photon state.