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Chinese Control Conference (CCC)

D-dimensional nondestructive teleportation based on non-maximally entangled channel

Fenxiang Fu, Chen Chen, Xu Huang, Min Jiang

Published Jul 1, 2019• 1 citation
Publisher

Abstract

Quantum teleportation aims to transfer an unknown quantum state between two remote parties who share an entangled pair in advance. We propose a quantum teleportation scheme for realizing d-dimensional point-to-point quantum teleportation without information loss based on non-maximally entangled Bell pairs. Compared with generalized probabilistic teleportation scheme, our scheme offers the chance to preserve the unknown quantum state if teleportation fails. In addition, our nondestructive teleportation scheme can reduce the communication delay on account of the fact that the information transmission and channel modulation can be performed simultaneously.

DOI
10.23919/chicc.2019.8865993

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Quantum teleportation aims to transfer an unknown quantum state between two remote parties who share an entangled pair in advance. We propose a quantum teleportation scheme for realizing d-dimensional point-to-point quantum teleportation without information loss based on non-maximally entangled Bell pairs. Compared with generalized probabilistic teleportation scheme, our scheme offers the chance to preserve the unknown quantum state if teleportation fails. In addition, our nondestructive teleportation scheme can reduce the communication delay on account of the fact that the information transmission and channel modulation can be performed simultaneously.
We propose a teleportation scheme for nondestructively transmitting an unknown qudit state between two remote communication parties that are linked by sequential Bell pairs. With independent and simultaneous entanglement swapping among the intermediate nodes, a direct entangled channel between the source node and the destination node is established. Our scheme preserves the initial unknown state even if the teleportation fails. Different nonmaximally entangled channels are distributed among the participants so that the quantum channel requirement is reduced. In addition, the communication delay is reduced significantly since the measuring and the transmitting are conducted simultaneously by the intermediate nodes.
In this paper a new scheme for teleporting an unknown entangled state of two particles is proposed. To weaken the requirement for the quantum channel, without loss of generality, two communicators only share a non-maximally entangled two-particle state. Teleportation can be probabilistically realized if sender performs Bell-state measurements and Hadamard transformation and receiver introduces two auxiliary particles, operates C -not operation, single-qubit measurements and appropriate unitary transformations. The probability of successful teleportation is determined by the smaller one among the coefficients' absolute values of the quantum channel.
We establish a scheme for probabilistically teleporting an unknown 3D(dimensional) two-particle state using non-maximally entangled states as a quantum channel.In this scheme,the probabilistic teleportation is realized by using the new orthogonal complete bases measurement instead of the traditional Bell measurement,and we also use 3D entangled state as the quantum channel.These are different from the previous schemes.This scheme is more convenient for the receiver,because users could realize communication with less operators.
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We consider a generalized quantum teleportation protocol for an unknown qubit using non-maximally entangled state as a shared resource. Without recourse to local filtering or entanglement concentration, using standard Bell-state measurement and classical communication one cannot teleport the state with unit fidelity and unit probability. We show that using non-maximally entangled measurements one can teleport an unknown state with unit fidelity albeit with reduced probability. We also give a generalized protocol for entanglement swapping using non-maximally entangled states. I.
We present a scheme for realizing probabilistic teleportation of an unknown N -atom state via cavity QED. This scheme requires only a nonmaximally entangled pair to be used as a quantum channel, so the requirement of entanglement is reduced. In addition, our scheme does not involve the Bell-state measurement and is insensitive to the cavity decay, which is important from the experimental point of view. If the quantum channel is a two-atom maximally entangled state, teleportation of an unknown N -atom state can be realized by a simpler scheme via cavity QED.