Results 61 to 70 of about 4,287,757 (400)
Optimal quantum channels [PDF]
Physical Review A, 2021 A method to optimize the cost of a quantum channel is developed. The goal is to determine the cheapest channel that produces prescribed output states for a given set of input states. This is essentially a quantum version of optimal transport. To attach a clear conceptual meaning to the cost, channels are viewed in terms of what we call elementary ...
openaire +4 more sources
Bounding the quantum capacity with flagged extensions [PDF]
Quantum, 2022 In this article we consider flagged extensions of convex combination of quantum channels, and find general sufficient conditions for the degradability of the flagged extension.
Farzad Kianvash +2 more
doaj +1 more source
Strong converse for the quantum capacity of the erasure channel for almost all codes [PDF]
, 2014 A strong converse theorem for channel capacity establishes that the error probability in any communication scheme for a given channel necessarily tends to one if the rate of communication exceeds the channel's capacity.
Wilde, Mark M., Winter, Andreas
core +4 more sources
Convex decomposition of dimension-altering quantum channels [PDF]
Int. J. Quantum Inform. Vol. 14, No. 8, 1650045 (2016), 2015 Quantum channels, which are completely positive and trace preserving mappings, can alter the dimension of a system; e.g., a quantum channel from a qubit to a qutrit. We study the convex set properties of dimension-altering quantum channels, and particularly the channel decomposition problem in terms of convex sum of extreme channels. We provide various
arxiv +1 more source
Quantum interference channels [PDF]
2011 49th Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2011 10 pages, 2 figures, submitted to the 2011 Allerton Conference on Communication, Control, and Computing; v3 has a proof for a two-sender quantum simultaneous decoder and as a result, we get the capacity for channels with strong ...
Pranab Sen +4 more
openaire +3 more sources
Teleportation of Accelerated Information [PDF]
, 2012 A theoretical quantum teleportation protocal is suggested to teleport accelerated and non-accelerated information over different classes of accelerated quantum channels.
Alsing +22 more
core +1 more source
Asymptotics of quantum channels
Journal of Physics A: Mathematical and Theoretical, 2023 Abstract We discuss several aspects concerning the asymptotic dynamics of discrete-time semigroups associated with a quantum channel. By using an explicit expression of the asymptotic map, which describes the action of the quantum channel on its attractor manifold, we investigate the role of permutations in the asymptotic dynamics.
Daniele Amato +2 more
openaire +3 more sources
Coherence of quantum channels [PDF]
Annals of Physics, 2018 11 pages, 7 figures.
Chandan Datta +3 more
openaire +4 more sources
Trade-off coding for universal qudit cloners motivated by the Unruh effect [PDF]
, 2011 A "triple trade-off" capacity region of a noisy quantum channel provides a more complete description of its capabilities than does a single capacity formula.
Bradler, Kamil +2 more
core +3 more sources
Amortized entanglement of a quantum channel and approximately teleportation-simulable channels [PDF]
arXiv.org, 2017 This paper defines the amortized entanglement of a quantum channel as the largest difference in entanglement between the output and the input of the channel, where entanglement is quantified by an arbitrary entanglement measure.
Eneet Kaur, M. Wilde
semanticscholar +1 more source