Results 71 to 80 of about 57,085 (156)

Topological Polar Textures in van der Waals Moiré Superlattices

open access: yesSmall Structures, Volume 7, Issue 2, February 2026.
Moiré superlattices allow the realization of several novel properties, including the formation of complex topological polarization textures in ultrathin samples consisting of layered 2D materials. This review highlights the rapid progress in this emerging field, both through theory and experiment, discusses the field's potential implications, and draws
Joshua Edwards   +4 more
wiley   +1 more source

On the topological ranks of Banach ∗$^*$‐algebras associated with groups of subexponential growth

open access: yesBulletin of the London Mathematical Society, Volume 58, Issue 2, February 2026.
Abstract Let G$G$ be a group of subexponential growth and C→qG$\mathcal C\overset{q}{\rightarrow }G$ a Fell bundle. We show that any Banach ∗$^*$‐algebra that sits between the associated ℓ1$\ell ^1$‐algebra ℓ1(G|C)$\ell ^1(G\,\vert \,\mathcal C)$ and its C∗$C^*$‐envelope has the same topological stable rank and real rank as ℓ1(G|C)$\ell ^1(G\,\vert ...
Felipe I. Flores
wiley   +1 more source

Large flats in the pants graph [PDF]

open access: yes, 2013
This note is about the geometry of the pants graph P(S), a natural simplicial graph associated to a finite type topological surface S where vertices represents pants decompositions.
Estévez, José L.
core  

Electrical Step‐Edge Contact to a Topological Superconductor Candidate 2M‐WS2

open access: yesAdvanced Science, Volume 13, Issue 2, 9 January 2026.
This work develops a step‐edge contact technique for encapsulated 2M‐WS2, effectively protecting the material from contamination and achieving ultralow contact resistance ( 65 µm). Highly transparent interfaces, as evidenced by Andreev reflection, enable the observation of intrinsic superconducting properties.
Qikang Gan   +19 more
wiley   +1 more source

Reflection positivity and invertible topological phases

open access: yes, 2019
We implement an extended version of reflection positivity (Wick-rotated unitarity) for invertible topological quantum field theories and compute the abelian group of deformation classes using stable homotopy theory.
Freed, Daniel S., Hopkins, Michael J.
core  

Randomized Hypergraph States and Their Entanglement Properties

open access: yesAnnalen der Physik, Volume 538, Issue 1, January 2026.
Randomized hypergraph (RH) states are mixed states that extend the concept of randomized graph states to multi‐qubit hypergraphs subject to probabilistic gate imperfections. By modeling noisy multi‐qubit operations, this work reveals nonmonotonic behavior in bipartite and multipartite entanglement, derives analytical witnesses for specific hypergraph ...
Vinícius Salem   +2 more
wiley   +1 more source

Nearly free divisors and rational cuspidal curves

open access: yes, 2015
We define a class of plane curves which are close to the free divisors and such that conjecturally it contains the class of rational cuspidal curves. Using a recent result by U.
Dimca, Alexandru, Sticlaru, Gabriel
core  

Simultaneous Bosonic and Fermionic T‐Dualization of the Type II Superstring Theory—Buscher Approach and Double Space Representation

open access: yesFortschritte der Physik, Volume 74, Issue 1, January 2026.
Abstract In this article I consider type II superstring in the pure spinor formulation with constant background fields in the context of T‐dualization. First, I prove that bosonic and fermionic T‐dualization commute using already known T‐dual transformation laws for bosonic and fermionic T‐dualization.
B. Nikolić
wiley   +1 more source

On the number of countably compact group topologies on a free Abelian group

open access: yesTopology and its Applications, 1999
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

On the Mackey problem for free abelian topological groups

open access: yes, 2018
Recently Au enhofer and the author independently have shown that the free abelian topological group $A(\mathbf{s})$ over a convergent sequence $\mathbf{s}$ does not admit the strongest compatible locally quasi-convex group topology that gives the first example of a locally quasi-convex abelian group without a Mackey group topology.
openaire   +2 more sources

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