Results 91 to 100 of about 4,583,269 (264)
Capacities of Quantum Erasure Channels [PDF]
Physical Review Letters, 1997 4 pages, RevTeX, epsf macros to include 2 eps figures. See also http://vesta.physics.ucla.edu/~smolin/ Version 2, submitted to Phys. Rev.
Charles H. Bennett +2 more
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Quantum capacity of a bosonic dephasing channel [PDF]
Physical Review A, 2020 We study the quantum capacity of continuous variable dephasing channel, which is a notable example of non-Gaussian quantum channel. We prove that a single letter formula applies. We then consider input energy restriction and show that by increasing it, the capacity saturates to a finite value. The optimal input state is found to be diagonal in the Fock
Arqand, Amir +2 more
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A note on quantum entropy inequalities and channel capacities [PDF]
J.Phys.A 36, 12081 (2003)., 2002 Quantum entropy inequalities are studied. Some quantum entropy inequalities are obtained by several methods. For entanglement breaking channel, we show that the entanglement-assisted classical capacity is upper bounded by $\log d$. A relationship between entanglement-assisted and one-shot unassisted capacities is obtained.
arxiv +1 more source
Shemesh Theorem and Its Relation With the Zero-Error Quantum Information Theory
IEEE AccessIn this paper, our objective is to establish results that connect Shemesh theorem with quantum zero-error information theory. To achieve this, we will first introduce definitions and properties related to the zero-error capacity of a quantum channel ...
Marciel M. De Oliveira +3 more
doaj +1 more source
Capacity of the noisy quantum channel [PDF]
Physical Review A, 1997 An upper limit is given to the amount of quantum information that can be transmitted reliably down a noisy, decoherent quantum channel. A class of quantum error-correcting codes is presented that allow the information transmitted to attain this limit. The result is the quantum analog of Shannon's bound and code for the noisy classical channel.
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Mathematics, 2023 Quantum teleportation is one of the fundamental primitives of quantum cryptography. In order to achieve a wider range of high-capacity information transfer, we propose a free-space quantum teleportation (QT) protocol with orbital angular momentum (OAM ...
Xinchao Ruan +6 more
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The capacity of hybrid quantum memory [PDF]
IEEE Transactions on Information Theory, 2003 The general stable quantum memory unit is a hybrid consisting of a classical digit with a quantum digit (qudit) assigned to each classical state. The shape of the memory is the vector of sizes of these qudits, which may differ. We determine when N copies of a quantum memory A embed in N(1+o(1)) copies of another quantum memory B.
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Quantum capacity of dephasing channels with memory [PDF]
New Journal of Physics, 2007 We show that the amount of coherent quantum information that can be reliably transmitted down a dephasing channel with memory is maximized by separable input states. In particular, we model the channel as a Markov chain or a multimode environment of oscillators.
Antonio D'Arrigo +3 more
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Classical capacity of a qubit depolarizing memory channel with Markovian correlated noise [PDF]
Proceedings of Asian Quantum Information Science (AQIS) 2015
conference, Seoul, South Korea, 2015 We study the classical capacity of a forgetful quantum memory channel that switches between two qubit depolarizing channels according to an ergodic Markov chain. The capacity of this quantum memory channel depends on the parameters of the two depolarizing channels and the memory of the ergodic Markov chain.
arxiv +1 more source
Experimental realization of the analogy of quantum dense coding in classical optics
AIP Advances, 2016 We report on the experimental realization of the analogy of quantum dense coding in classical optical communication using classical optical correlations.
Zhenwei Yang +5 more
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