Results 41 to 50 of about 4,417,507 (366)
Quantum codes from neural networks
New Journal of Physics, 2020 We examine the usefulness of applying neural networks as a variational state ansatz for many-body quantum systems in the context of quantum information-processing tasks.
Johannes Bausch, Felix Leditzky
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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
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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
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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
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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
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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
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QUANTUM ZERO-ERROR CAPACITY [PDF]
International Journal of Quantum Information, 2005 We define a new kind of quantum channel capacity by extending the concept of zero-error capacity for a noisy quantum channel. The necessary requirement for which a quantum channel has zero-error capacity greater than zero is given. Finally, we point out some directions on how to calculate the zero-error capacity of such channels.
Rex A. C. Medeiros +1 more
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Unbounded number of channel uses may be required to detect quantum capacity [PDF]
Nature Communications, 2014 Transmitting data reliably over noisy communication channels is one of the most important applications of information theory, and is well understood for channels modelled by classical physics.
T. Cubitt +5 more
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Capacity of trace decreasing quantum operations and superadditivity of coherent information for a generalized erasure channel [PDF]
Journal of Physics A: Mathematical and Theoretical, 2021 Losses in quantum communication lines severely affect the rates of reliable information transmission and are usually considered to be state-independent.
S. Filippov
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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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