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We argue that entropy production in hydrodynamics can be understood via a superspace inflow mechanism. Our arguments are based on a recently developed formalism for constructing effective actions for Schwinger-Keldysh observables in quantum…

High Energy Physics - Theory · Physics 2018-08-08 Felix M. Haehl , R. Loganayagam , Mukund Rangamani

We introduce the Feldman-Katok pseudometric (FK-pseudometric for short) for flows. We then provide a characterization of zero entropy loosely Bernoulli measures for continuous flows via the FK-pseudometric extending the result known for…

Dynamical Systems · Mathematics 2025-03-14 Alexandre Trilles

We construct symbolic dynamics for flows with positive speed in any dimension: for each $\chi>0$, we code a set that has full measure for every invariant probability measure which is $\chi$--hyperbolic. In particular, the coded set contains…

Dynamical Systems · Mathematics 2025-09-12 Yuri Lima , Juan Carlos Mongez , João Paulo Nascimento

We prove that every $C^1$ three-dimensional flow with positive topological entropy can be $C^1$ approximated by flows with homoclinic orbits. This extends a previous result for $C^1$ surface diffeomorphisms \cite{g}.

Dynamical Systems · Mathematics 2015-09-28 A. M. Lopez , R. J. Metzger , C. A. Morales

In this work we study the problem of positiveness of topological entropy for flows using pointwise dynamics. We show that the existence of a non-periodic nonwandering point of an expansive and non-singular flow with shadowing is a…

Dynamical Systems · Mathematics 2022-07-05 Elias Rego , Alexander Arbieto

Let S be an ergodic measure-preserving automorphism on a non-atomic probability space, and let T be the time-one map of a topologically weak mixing suspension flow over an irreducible subshift of finite type under a Holder ceiling function.…

Dynamical Systems · Mathematics 2012-08-20 Anthony Quas , Terry Soo

Let $f$ be a $C^r$ surface diffeomorphism with large entropy (more precisely, $h_{\rm top}(f)>\lambda_{\min}(f)/{r}$). Then the number of ergodic measures of maximal entropy is upper semicontinuous at $f$. This generalizes the $C^\infty$…

Dynamical Systems · Mathematics 2025-12-01 Jérôme Buzzi , Chiyi Luo , Dawei Yang

A power-free language is characterized by the number of symbols used and a limit on how many times a block of symbols can repeat consecutively. For certain values of these parameters, it is known that the number of legal words grows…

Dynamical Systems · Mathematics 2025-07-28 Vaughn Climenhaga

In this work, we investigate diffeomorphisms whose positiveness of topological entropy is destroyed by singular suspensions. We show that this phenomenon is rare in the set of $C^1$-diffeomorphisms. Precisely, we prove that for an open and…

Dynamical Systems · Mathematics 2025-08-22 Elias Rego , Sergio Romaña

We consider suspension flows with continuous roof function over the full shift $\Sigma$ on a finite alphabet. For any positive entropy subshift of finite type $Y \subset \Sigma$, we explictly construct a roof function such that the…

Dynamical Systems · Mathematics 2019-03-13 Tamara Kucherenko , Daniel J. Thompson

We prove that any 3-dimensional singular hyperbolic attractor admits for any H\"older continuous potential $V$ at most one equilibrium state for $V$ among regular measures. We give a condition on $V$ which ensures that no singularity can be…

Dynamical Systems · Mathematics 2019-05-16 Renaud Leplaideur

In this article we study geodesic flows on closed Riemannian manifolds without conjugate points and divergence property of geodesic rays. If the fundamental group is Gromov hyperbolic and residually finite we prove, under appropriate…

Dynamical Systems · Mathematics 2025-11-06 Gerhard Knieper

We study the thermodynamic formalism for suspension flows over countable Markov shifts with roof functions not necessarily bounded away from zero. We establish conditions to ensure the existence and uniqueness of equilibrium measures for…

Dynamical Systems · Mathematics 2016-01-05 Godofredo Iommi , Thomas Jordan , Mike Todd

In this survey we provide an overview of our recent results concerning Ricci de Turck flow on spaces with isolated conical singularities. The crucial characteristic of the flow is that it preserves the conical singularity. Under certain…

Differential Geometry · Mathematics 2021-01-25 Klaus Kroencke , Boris Vertman

In this paper we study aspects of the ergodic theory of the geodesic flow on a non-compact negatively curved manifold. It is a well known fact that every continuous potential on a compact metric space has a maximizing measure.…

Dynamical Systems · Mathematics 2020-01-07 Felipe Riquelme , Anibal Velozo

Thermodynamics can be formulated in either of two approaches, the phenomenological approach, which refers to the macroscopic properties of systems, and the statistical approach, which describes systems in terms of their microscopic…

Quantum Physics · Physics 2019-05-01 Mirjam Weilenmann , Lea Krämer Gabriel , Philippe Faist , Renato Renner

We construct symbolic dynamics for three dimensional flows with positive speed. More precisely, for each $\chi>0$, we code a set of full measure for every invariant probability measure which is $\chi$-hyperbolic. These include all ergodic…

Dynamical Systems · Mathematics 2023-07-27 Jérôme Buzzi , Sylvain Crovisier , Yuri Lima

In this article, we pay attention to transitive dynamical systems having the shadowing property and the entropy functions are upper semicontinuous. As for these dynamical systems, when we consider ergodic optimization restricted on the…

Dynamical Systems · Mathematics 2021-12-24 Wanshan Lin , Xueting Tian

We revisit the existence of monotonic quantities along renormalization group flows using only the Null Energy Condition and the Ryu-Takayanagi formula for the entanglement entropy of field theories with anti-de Sitter gravity duals. In…

High Energy Physics - Theory · Physics 2024-09-27 Evan Deddo , James T. Liu , Leopoldo A. Pando Zayas , Robert J. Saskowski

We study the Bowen topological entropy of generic and irregular points for certain dynamical systems. We define the topological entropy of noncompact sets for flows, analogous to Bowen's definition. We show that this entropy coincides with…

Dynamical Systems · Mathematics 2022-08-12 Maria Jose Pacifico , Diego Sanhueza