Results 41 to 50 of about 4,583,269 (264)
A Decoupling Approach to the Quantum Capacity [PDF]
Open Systems & Information Dynamics, 2008 We give a short proof that the coherent information is an achievable rate for the transmission of quantum information through a noisy quantum channel. Our method is to produce random codes by performing a unitarily covariant projective measurement on a typical subspace of a tensor power state.
Michał Horodecki +4 more
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Activation of the quantum capacity of Gaussian channels [PDF]
Physical Review A, 2018 Quantum channels can be activated by a kind of channels whose quantum capacity is zero. This activation effect might be useful to overcome noise of channels by attaching other channels which can enhance the capacity of a given channel.
Youngrong Lim, Soojoon Lee
semanticscholar +1 more source
A Survey on Quantum Channel Capacities [PDF]
IEEE Communications Surveys & Tutorials, 2018 Quantum information processing exploits the quantum nature of information. It offers fundamentally new solutions in the field of computer science and extends the possibilities to a level that cannot be imagined in classical communication systems. For quantum communication channels, many new capacity definitions were developed in comparison to classical
Laszlo Gyongyosi +2 more
openaire +7 more sources
A semidefinite programming upper bound of quantum capacity [PDF]
International Symposium on Information Theory, 2016 Recently the power of positive partial transpose preserving (PPTp) and no-signalling (NS) codes in quantum communication has been studied. We continue with this line of research and show that the NS/PPTp/NS∩PPTp codes assisted zero-error quantum capacity
Xin Wang, R. Duan
semanticscholar +1 more source
Bounding quantum capacities via partial orders and complementarity [PDF]
IEEE Transactions on Information Theory 69(1), pp.283 - 297, 2022, 2022 Quantum capacities are fundamental quantities that are notoriously hard to compute and can exhibit surprising properties such as superadditivity. Thus, a vast amount of literature is devoted to finding tight and computable bounds on these capacities. We add a new viewpoint by giving operationally motivated bounds on several capacities, including the ...
arxiv +1 more source
Quantum transduction is enhanced by single mode squeezing operators
Physical Review Research, 2022 Quantum transduction is an essential ingredient in scaling up distributed quantum architecture and is actively pursued based on various physical platforms.
Changchun Zhong +4 more
doaj +1 more source
Capacity and quantum mechanical tunneling [PDF]
Communications in Mathematical Physics, 1981 We connect the notion of capacity of sets in the theory of symmetric Markov process and Dirichlet forms with the notion of tunneling through the boundary of sets in quantum mechanics. In particular we show that for diffusion processes the notion appropriate to a boundary without tunneling is more refined than simply capacity zero.
Albeverio, Sergio +3 more
openaire +3 more sources
Upper bounds on the quantum capacity for a general attenuator and amplifier [PDF]
Physical Review A, 2019 There have been several upper bounds on the quantum capacity of the single-mode Gaussian channels with thermal noise, such as thermal attenuator and amplifier.
Youngrong Lim +3 more
semanticscholar +1 more source
Entropy, 2023 A protective scheme of quantum dense coding and quantum teleportation of the X-type initial state is proposed in amplitude damping noisy channel with memory using weak measurement and measurement reversal.
Meijiao Wang +6 more
doaj +1 more source
Potential Capacities of Quantum Channels [PDF]
IEEE Transactions on Information Theory, 2016 10 pages, IEEE style; minor changes, references added; accepted for publication in EEE Trans Inf ...
Andreas Winter, Dong Yang
openaire +4 more sources