Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:quant-ph/0605171 · Chinese Physics Letters

Classical Capacity for a Continuous Variable Teleportation Channel

Qin Tao, Meisheng Zhao, Zhang Yong-De

Published Jan 18, 2007• 3 citations
arXivHTMLPDF

Abstract

The process of quantum teleportation can be considered as a quantum channel. The exact classical capacity of the continuous variable teleportation channel is presented and the channel fidelity is also derived.
DOI
10.1088/0256-307x/24/2/007

Related papers

Criteria for continuous-variable quantum teleportation

Samuel L. Braunstein, Christopher A. Fuchs, Harry J. Kimble

We derive an experimentally testable criterion for the teleportation of quantum states of continuous variables. This criterion is especially relevant to the recent experiment of Furusawa et al. where an input—output fidelity of 0.58 ± 0.02 was achieved for optical coherent stages. Our derivation demonstrates that fidelities greater than 1/2 could not have been achieved through the use of a classical channel alone; quantum entanglement was a crucial ingredient in the experiment.

Journal of Modern Optics•Feb 15, 2000•44 citations

Criteria for continuous-variable quantum teleportation

Samuel L. Braunstein, Christopher A. Fuchs, H. J. Kimble

We derive an experimentally testable criterion for the teleportation of quantum states of continuous variables. This criterion is especially relevant to the recent experiment of Furusawa et al. where an input—output fidelity of 0.58 ± 0.02 was achieved for optical coherent stages. Our derivation demonstrates that fidelities greater than 1/2 could not have been achieved through the use of a classical channel alone; quantum entanglement was a crucial ingredient in the experiment.

arXiv:quant-ph/9910030•Journal of Modern Optics•Feb 1, 2000•188 citations

Continuous variable teleportation as a generalized thermalizing quantum channel

Masashi Ban, Masahide Sasaki, Masahiro Takeoka

A quantum channel is derived for continuous variable teleportation which is performed by means of an arbitrary entangled state and the standard protocol. When a Gaussian entangled state such as a two-mode squeezed-vacuum state is used, the continuous variable teleportation is equivalent to the thermalizing quantum channel. Continuous variable quantum dense coding is also considered.

arXiv:quant-ph/0202172•Journal of Physics A Mathematical and General•Jul 5, 2002•37 citations

Criteria for Continuous-Variable Quantum Teleportation

Braunstein, S L, Christopher A. Fuchs, Kimble, H J

We derive an experimentally testable criterion for the teleportation of quantum states of continuous variables. This criterion is especially relevant to the recent experiment of Furusawa et al. [Science 282, 706-709 (1998)] where an input-output fidelity of $0.58 \\pm 0.02$ was achieved for optical coherent states. Our derivation demonstrates that fidelities greater than 1/2 could not have been achieved through the use of a classical channel alone; quantum entanglement was a crucial ingredient in the experiment.

•Oct 8, 1999•114 citations

Characterizing teleportation in optics

Timothy C. Ralph, P K Lam, R E S Polkinghorne

We discuss the characterization of continuous variable, optical quantum teleportation in terms of the two quadrature signal transfer and conditional variances between the input and output states. We derive criteria which clearly define the classical limits and highlight interesting operating points which are not obvious from a calculation of the fidelity of the teleportation alone. 1.

•Jan 1, 1999•20 citations

Quantum versus classical domains for teleportation with continuous variables

Samuel L. Braunstein, Christopher A. Fuchs, Harry J. Kimble +1 more

By considering the utilization of a classical channel without quantum entanglement, fidelity ${F}_{\mathrm{classical}}=\frac{1}{2}$ has been established as setting the boundary between classical and quantum domains in the teleportation of coherent states of the electromagnetic field [S. L. Braunstein, C. A. Fuchs, and H. J. Kimble, J. Mod. Opt. $47,$ 267 (2000)]. We further examine the quantum-classical boundary by investigating questions of entanglement and Bell-inequality violations for the Einstein-Podolsky-Rosen states relevant to continuous variable teleportation. The threshold fidelity for employing entanglement as a quantum resource in teleportation of coherent states is again found to be ${F}_{\mathrm{classical}}=\frac{1}{2}.$ Likewise, violations of local realism onset at this same threshold, with the added requirement of overall efficiency $\ensuremath{\eta}>\frac{2}{3}$ in the unconditional case. By contrast, recently proposed criteria adapted from the literature on quantum-nondemolition detection are shown to be largely unrelated to the questions of entanglement and Bell-inequality violations.

arXiv:quant-ph/0012001•Physical Review A•Jul 18, 2001•136 citations
We derive an experimentally testable criterion for the teleportation of quantum states of continuous variables. This criterion is especially relevant to the recent experiment of Furusawa et al. [Science 282, 706-709 (1998)] where an input-output fidelity of 0.58pm0.020.58 \\pm 0.020.58pm0.02 was achieved for optical coherent states. Our derivation demonstrates that fidelities greater than 1/2 could not have been achieved through the use of a classical channel alone; quantum entanglement was a crucial ingredient in the experiment.
By considering the utilization of a classical channel without quantum entanglement, fidelity Fclassical=12{F}_{\mathrm{classical}}=\frac{1}{2}Fclassical​=21​ has been established as setting the boundary between classical and quantum domains in the teleportation of coherent states of the electromagnetic field [S. L. Braunstein, C. A. Fuchs, and H. J. Kimble, J. Mod. Opt. 47,47,47, 267 (2000)]. We further examine the quantum-classical boundary by investigating questions of entanglement and Bell-inequality violations for the Einstein-Podolsky-Rosen states relevant to continuous variable teleportation. The threshold fidelity for employing entanglement as a quantum resource in teleportation of coherent states is again found to be Fclassical=12.{F}_{\mathrm{classical}}=\frac{1}{2}.Fclassical​=21​. Likewise, violations of local realism onset at this same threshold, with the added requirement of overall efficiency $\ensuremath{\eta}>\frac{2}{3}$ in the unconditional case. By contrast, recently proposed criteria adapted from the literature on quantum-nondemolition detection are shown to be largely unrelated to the questions of entanglement and Bell-inequality violations.