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C0-stability of topological entropy for contactomorphisms [PDF]

open access: yes, 2020
Topological entropy is not lower semi-continous: small perturbation of the dynamical system can lead to a collapse of entropy. In this note we show that for some special classes of dynamical systems (geodesic flows, Reeb flows, positive contactomorphisms)
Lucas Dahinden
semanticscholar   +1 more source

Entanglement Entropy in the Ising Model with Topological Defects. [PDF]

open access: yesPhysical Review Letters, 2021
Entanglement entropy (EE) contains signatures of many universal properties of conformal field theories (CFTs), especially in the presence of boundaries or defects.
A. Roy, H. Saleur
semanticscholar   +1 more source

Quantum de Sitter horizon entropy from quasicanonical bulk, edge, sphere and topological string partition functions [PDF]

open access: yesJournal of High Energy Physics, 2020
Motivated by the prospect of constraining microscopic models, we calculate the exact one-loop corrected de Sitter entropy (the logarithm of the sphere partition function) for every effective field theory of quantum gravity, with particles in arbitrary ...
D. Anninos   +3 more
semanticscholar   +1 more source

Topological entropy for impulsive differential equations

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2020
A positive topological entropy is examined for impulsive differential equations via the associated Poincaré translation operators on compact subsets of Euclidean spaces and, in particular, on tori.
Jan Andres
doaj   +1 more source

Entropy of foliations with leafwise Finsler structure [PDF]

open access: yesOpuscula Mathematica, 2016
We extend the notion of the geometric entropy of foliation to foliated manifolds equipped with leafwise Finsler structure. We study the relation between the geometric entropy and the topological entropy of the holonomy pseudogroup. The case of a foliated
Ilona Michalik, Szymon Walczak
doaj   +1 more source

Entropy of Iterated Function Systems and Their Relations with Black Holes and Bohr-Like Black Holes Entropies

open access: yesEntropy, 2018
In this paper we consider the metric entropies of the maps of an iterated function system deduced from a black hole which are known the Bekenstein–Hawking entropies and its subleading corrections.
Christian Corda   +3 more
doaj   +1 more source

Hausdorff Dimension and Topological Entropies of a Solenoid

open access: yesEntropy, 2020
The purpose of this paper is to elucidate the interrelations between three essentially different concepts: solenoids, topological entropy, and Hausdorff dimension.
Andrzej Biś, Agnieszka Namiecińska
doaj   +1 more source

Ensemble-based topological entropy calculation (E-tec). [PDF]

open access: yesChaos, 2018
Topological entropy measures the number of distinguishable orbits in a dynamical system, thereby quantifying the complexity of chaotic dynamics. One approach to computing topological entropy in a two-dimensional space is to analyze the collective motion ...
Eric Roberts   +3 more
semanticscholar   +1 more source

Entropy dimension of shifts of finite type on free groups

open access: yesAIMS Mathematics, 2020
This paper considers the topological degree of G-shifts of finite type for the case where G is a finitely generated free group. Topological degree is the logarithm of entropy dimension; that is, topological degree is a characterization for zero entropy ...
Jung-Chao Ban, Chih-Hung Chang
doaj   +1 more source

Topological order and topological entropy in classical systems [PDF]

open access: yesPhysical Review B, 2007
We show that the concept of topological order, introduced to describe ordered quantum systems which cannot be classified by broken symmetries, also applies to classical systems. Starting from a specific example, we show how to use pure state density matrices to construct corresponding thermally mixed ones that retain precisely half the original ...
Castelnovo, Claudio, Chamon, Claudio
openaire   +5 more sources

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