Results 41 to 50 of about 1,285,086 (339)

BD entropy and Bernis–Friedman entropy

open access: yesComptes Rendus. Mathématique, 2018
In this note, we propose in the full generality a link between the BD entropy introduced by D. Bresch and B. Desjardins for the viscous shallow-water equations and the Bernis–Friedman (called BF) dissipative entropy introduced to study the lubrication equations.
Bresch, Didier   +4 more
openaire   +5 more sources

Stabilizer Rényi Entropy [PDF]

open access: yesPhysical Review Letters, 2022
We introduce a novel measure for the quantum property of nonstabilizerness - commonly known as "magic" - by considering the R nyi entropy of the probability distribution associated to a pure quantum state given by the square of the expectation value of Pauli strings in that state. We show that this is a good measure of nonstabilizerness from the point
Lorenzo Leone   +2 more
openaire   +6 more sources

Acknowledgement to Reviewers of Entropy in 2018

open access: yesEntropy, 2019
Rigorous peer-review is the corner-stone of high-quality academic publishing [...]
Entropy Editorial Office
doaj   +1 more source

Gibbs–Jaynes Entropy Versus Relative Entropy

open access: yesJournal of Statistical Physics, 2014
The maximum entropy formalism developed by Jaynes determines the relevant ensemble in nonequilibrium statistical mechanics by maximising the entropy functional subject to the constraints imposed by the available information. We present an alternative derivation of the relevant ensemble based on the Kullback-Leibler divergence from equilibrium.
Meléndez, M., Español, P.
openaire   +3 more sources

Spin Entropy

open access: yesEntropy, 2022
Two types of randomness are associated with a mixed quantum state: the uncertainty in the probability coefficients of the constituent pure states and the uncertainty in the value of each observable captured by the Born’s rule probabilities. Entropy is a quantification of randomness, and we propose a spin-entropy for the observables of spin pure states ...
Davi Geiger, Zvi M. Kedem
openaire   +4 more sources

Microcanonical entropy for classical systems [PDF]

open access: yes, 2017
The entropy definition in the microcanonical ensemble is revisited. We propose a novel definition for the microcanonical entropy that resolve the debate on the correct definition of the microcanonical entropy.
Franzosi, Roberto
core   +2 more sources

Acknowledgement to Reviewers of Entropy in 2015

open access: yesEntropy, 2016
The editors of Entropy would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2015. [...]
Entropy Editorial Office
doaj   +1 more source

Tailoring Ferrimagnetic Transition Temperatures, Coercivity Fields, and Saturation Magnetization by Modulating Mn Concentration in (CoCrFeNi)1−xMnx High-Entropy Alloys

open access: yesFrontiers in Materials, 2022
Cr and Mn play intriguing roles in determining the magnetic properties of CoFeNi-based high-entropy alloys (HEA). In this study, we tune the stoichiometric Mn composition to systematically explore the magnetic properties of (CoCrFeNi)1−xMnx HEAs.
Chi-Hung Lee   +15 more
doaj   +1 more source

GENERALIZED ENTROPIES [PDF]

open access: yes, 2013
21 ...
Dupuis Frederic   +4 more
openaire   +2 more sources

Information Equation of State

open access: yes, 2008
Landauer's principle is applied to information in the universe. Once stars began forming, the increasing proportion of matter at high stellar temperatures compensated for the expanding universe to provide a near constant information energy density.
Feynman   +5 more
core   +2 more sources

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