Results 31 to 40 of about 352,298 (333)

Generic Stationary Measures and Actions [PDF]

open access: yes, 2015
Let $G$ be a countably infinite group, and let $\mu$ be a generating probability measure on $G$. We study the space of $\mu$-stationary Borel probability measures on a topological $G$ space, and in particular on $Z^G$, where $Z$ is any perfect Polish ...
Bowen, Lewis, Hartman, Yair, Tamuz, Omer
core   +2 more sources

Topological Boundary Constraints in Artificial Colloidal Ice [PDF]

open access: yesPhysical Review Letters, 2021
The effect of boundaries and how these can be used to influence the bulk behaviour in geometrically frustrated systems are both long-standing puzzles, often relegated to secondary role. Here we use numerical simulations and "proof of concept" experiments to demonstrate that boundaries can be engineered to control the bulk behavior in a colloidal ...
Rodríguez-Gallo, Carolina   +2 more
openaire   +4 more sources

Towards Bulk Metric Reconstruction from Extremal Area Variations [PDF]

open access: yes, 2019
The Ryu-Takayanagi and Hubeny-Rangamani-Takayanagi formulae suggest that bulk geometry emerges from the entanglement structure of the boundary theory. Using these formulae, we build on a result of Alexakis, Balehowsky, and Nachman to show that in four ...
Bao, Ning   +3 more
core   +2 more sources

Induced Topological Phases at the Boundary of 3D Topological Superconductors [PDF]

open access: yesPhysical Review Letters, 2015
We present tight-binding models of 3D topological superconductors in class DIII that support a variety of winding numbers. We show that gapless Majorana surface states emerge at their boundary in agreement with the bulk-boundary correspondence.
Finch, P   +3 more
openaire   +4 more sources

Topological boundaries of covariant representations

open access: yesMATHEMATICA SCANDINAVICA, 2023
We associate a boundary $\mathcal B_{\pi ,u}$ to each covariant representation $(\pi ,u,H)$ of a $C^*$-dynamical system $(G,A,\alpha )$ and study the action of $G$ on $\mathcal B_{\pi ,u}$ and its amenability properties. We relate rigidity properties of traces on the associated crossed product $C^*$-algebra to faithfulness of the action of the group on
Amini, Massoud, Zavar, Sajad
openaire   +2 more sources

Thermodynamics of (3+1)-dimensional black holes with toroidal or higher genus horizons [PDF]

open access: yes, 1997
We examine counterparts of the Reissner-Nordstrom-anti-de Sitter black hole spacetimes in which the two-sphere has been replaced by a surface Sigma of constant negative or zero curvature.
A. Ashtekar   +58 more
core   +2 more sources

Topological Boundary Modes from Translational Deformations

open access: yesPhysical Review Letters, 2020
11 pages, 13 ...
Yosuke Nakata   +3 more
openaire   +4 more sources

Topology Adaptive Water Boundary Extraction Based on a Modified Balloon Snake: Using GF-1 Satellite Images as an Example

open access: yesRemote Sensing, 2017
Topology adaptive water boundary extraction from satellite images using parametric snakes remains challenging in the domain of image segmentation. This paper proposed a modified balloon snake (MB-Snake) method based on the balloon snake (B-Snake) method,
Wenying Du, Nengcheng Chen, Dandan Liu
doaj   +1 more source

Monoids, their boundaries, fractals and C*-algebras

open access: yesTopological Algebra and its Applications, 2020
In this note we establish some connections between the theory of self-similar fractals in the sense of John E. Hutchinson (cf. [3]), and the theory of boundary quotients of C*-algebras associated to monoids.
dal Verme Giulia, Weigel Thomas
doaj   +1 more source

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