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OSA Trends in Optics and Photonics Series

Experimental realization of quantum teleportation network

Hidehiro Yonezawa, Takao Aoki, Akira Furusawa

Published Jan 1, 2004• 0 citations
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Abstract

A quantum teleportation network for continuous variables is experimentally demonstrated. Using a tripartite entangled state generated by three independent squeezed vacuum states, we exchange coherent states of electromagnetic fields among three parties

Related papers

Experimental realization of quantum teleportation network

Hidehiro Yonezawa, Takao Aoki, Akira Furusawa

A quantum teleportation network for continuous variables is experimentally demonstrated. Using a tripartite entangled state generated by three independent squeezed vacuum states, we exchange coherent states of electromagnetic fields among three parties.

Conference on Lasers and Electro-Optics•Jan 1, 2004•0 citations

Continuous Variable Tripartite Entanglement and a Teleportation Network

Takao Aoki

We experimentally generate a continuous variable tripartite entangled state and prove its full inseparability. By using this state, we develop a tripartite quantum teleportation network and perform teleportation of a coherent state with three different combinations of the sender, the receiver, and the controller.

AIP conference proceedings•Jan 1, 2004•0 citations

Quantum teleportation of an entangled pair for continuous variables

В. Н. Горбачев, A. I. Zhiliba, Andrew I. Trubilko

The teleportation of a two-particle entangled state, using a Greenberger-Horne-Zeilinger triplet, for continuous variables is studied. The basis for joint three-particle measurements is found, where the vectors describe the states in which only two of three particles are entangled. It represents the measurement of the momentum of one particle and the difference of coordinates and the sum of momenta of the two other particles. An optical realization of this scheme is presented, which uses squeezed states of light and reduces the measurement of momentum and coordinate to the detection of quadrature operators of the electromagnetic field.

Optics and Spectroscopy•Sep 1, 2001•0 citations

Experimental Quantum Teleportation of Laser Beams

T Zhang

We experimentally demonstrate quantum teleportation for continuous variables by using squeezed-state entanglement. A fidelity expression for a real experimental system is presented, where all the imperfection factors are considered, including losses and phase fluctuations. The measured fidelity for input coherent states is 0.62 and the prospective result with our measured entanglement and efficiencies is 0.69. We will show the details of the quantum teleportation for continuous variable and discuss the problems for further improvement in this experiment.

Acta Sinica Quantum Optica•Jan 1, 2002•0 citations

Quantum teleportation of light beams

Ting Zhang, Kok Win Goh, C. W. Chou +2 more

We experimentally demonstrate quantum teleportation for continuous variables using squeezed-state entanglement. The teleportation fidelity for a real experimental system is calculated explicitly, including relevant imperfection factors such as propagation losses, detection inefficiencies, and phase fluctuations. The inferred fidelity for input coherent states is $F=0.61\ifmmode\pm\else\textpm\fi{}0.02,$ which when corrected for the efficiency of detection by the output observer, gives a fidelity of $0.62.$ By contrast, the projected result based on the independently measured entanglement and efficiencies is $0.69.$ The teleportation protocol is explained in detail, including a discussion on discrepancy between experiment and theory, as well as on the limitations of the current apparatus.

arXiv:quant-ph/0207076•Physical Review A•Mar 11, 2003•254 citations

Application of Bipartite and Tripartite Entangled State Representations in Quantum Teleportation of Continuous Variables

Hong‐Chun Yuan, Qi Kai-Guo

We mostly investigate two schemes. One is to teleport a multi-mode W-type entangled coherent state using a peculiar bipartite entangled state as the quantum channel different from other proposals. Based on our formalism, teleporting multi-mode coherent state or squeezed state is also possible. Another is that the tripartite entangled state is used as the quantum channel of controlled teleportation of an arbitrary and unknown continuous variable in the case of three participators.

Communications in Theoretical Physics•Aug 1, 2005•5 citations
The teleportation of a two-particle entangled state, using a Greenberger-Horne-Zeilinger triplet, for continuous variables is studied. The basis for joint three-particle measurements is found, where the vectors describe the states in which only two of three particles are entangled. It represents the measurement of the momentum of one particle and the difference of coordinates and the sum of momenta of the two other particles. An optical realization of this scheme is presented, which uses squeezed states of light and reduces the measurement of momentum and coordinate to the detection of quadrature operators of the electromagnetic field.
We experimentally demonstrate quantum teleportation for continuous variables by using squeezed-state entanglement. A fidelity expression for a real experimental system is presented, where all the imperfection factors are considered, including losses and phase fluctuations. The measured fidelity for input coherent states is 0.62 and the prospective result with our measured entanglement and efficiencies is 0.69. We will show the details of the quantum teleportation for continuous variable and discuss the problems for further improvement in this experiment.
We experimentally demonstrate quantum teleportation for continuous variables using squeezed-state entanglement. The teleportation fidelity for a real experimental system is calculated explicitly, including relevant imperfection factors such as propagation losses, detection inefficiencies, and phase fluctuations. The inferred fidelity for input coherent states is $F=0.61\ifmmode\pm\else\textpm\fi{}0.02,$ which when corrected for the efficiency of detection by the output observer, gives a fidelity of 0.62.0.62.0.62. By contrast, the projected result based on the independently measured entanglement and efficiencies is 0.69.0.69.0.69. The teleportation protocol is explained in detail, including a discussion on discrepancy between experiment and theory, as well as on the limitations of the current apparatus.