Results 61 to 70 of about 5,151,731 (334)

Classical capacity of quantum channels with memory

open access: yesPhysical Review A, 2009
We investigate the classical capacity of two quantum channels with memory: a periodic channel with depolarizing channel branches, and a convex combination of depolarizing channels. We prove that the capacity is additive in both cases. As a result, the channel capacity is achieved without the use of entangled input states.
Dorlas, T. C., Morgan, Ciara
openaire   +2 more sources

Classical capacities of quantum channels with environment assistance [PDF]

open access: yesProblems of Information Transmission, 2016
A quantum channel physically is a unitary interaction between the information carrying system and an environment, which is initialized in a pure state before the interaction. Conventionally, this state, as also the parameters of the interaction, is assumed to be fixed and known to the sender and receiver.
S. Karumanchi   +3 more
openaire   +5 more sources

Classical Capacity for a Continuous Variable Teleportation Channel [PDF]

open access: yesChinese Physics Letters, 2007
The process of quantum teleportation can be considered as a quantum channel. The exact classical capacity of the continuous variable teleportation channel is given. Also, the channel fidelity is derived. Consequently, the properties of the continuous variable quantum teleportation are discussed and interesting results are obtained.
Tao Qin, Yong-De Zhang, Meisheng Zhao
openaire   +4 more sources

Classical fluids of negative heat capacity [PDF]

open access: yesJournal of Statistical Physics, 1993
It is shown that new parametersX can be defined such that the heat capacity Cx≡T(∂S/∂T)x is negative, even when the canonical ensemble [i.e., at fixed T=(∂U/∂S)Y and Y≠X] is stable. This implies an extension of the classical theory of polytropes from ideal gases to general fluids.
R. P. Woodard, P. T. Landsberg
openaire   +6 more sources

On the constrained classical capacity of infinite-dimensional covariant quantum channels [PDF]

open access: yes, 2014
The additivity of the minimal output entropy and that of the χ-capacity are known to be equivalent for finite-dimensional irreducibly covariant quantum channels.
A. Holevo
semanticscholar   +1 more source

Equivalence relations for the classical capacity of single-mode Gaussian quantum channels. [PDF]

open access: yesPhysical Review Letters, 2013
We prove the equivalence of an arbitrary single-mode Gaussian quantum channel and a newly defined fiducial channel preceded by a phase shift and followed by a Gaussian unitary operation.
J. Schäfer   +4 more
semanticscholar   +1 more source

Data‐driven performance metrics for neural network learning

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView., 2023
Summary Effectiveness of data‐driven neural learning in terms of both local mimima trapping and convergence rate is addressed. Such issues are investigated in a case study involving the training of one‐hidden‐layer feedforward neural networks with the extended Kalman filter, which reduces the search for the optimal network parameters to a state ...
Angelo Alessandri   +2 more
wiley   +1 more source

Degeneracy and Its Impact on the Decoding of Sparse Quantum Codes

open access: yesIEEE Access, 2021
The well-documented capacity-approaching performance of sparse codes in the realm of classical communications has inspired the search for their quantum counterparts.
Patricio Fuentes   +3 more
doaj   +1 more source

Failure surface for shallow foundations in sand using a classical bearing capacity

open access: yesSoils and Foundations, 2022
Much effort has been made to elucidate the ultimate capacity of shallow foundations under the general cases of vertical (V), lateral (H), and moment (M) loads in soils.
Hiroyoshi Hirai
doaj  

The Changing Face of Accountability in Humanitarianism: Using Artificial Intelligence for Anticipatory Action

open access: yesPolitics and Governance, 2020
Over the past two decades, humanitarian conduct has been drifting away from the classical paradigm. This drift is caused by the blurring of boundaries between development aid and humanitarianism and the increasing reliance on digital technologies and ...
Marc J. C. van den Homberg   +2 more
doaj   +1 more source

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