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Datasets in high-dimension do not typically form clusters in their original space; the issue is worse when the number of points in the dataset is small. We propose a low-computation method to find statistically significant clustering…

机器学习 · 统计学 2020-08-24 Alden Bradford , Tarun Yellamraju , Mireille Boutin

Advancements in the synthesis of faceted nanoparticles and colloids have spurred interest in the phase behavior of polyhedral shapes. Regular tetrahedra have attracted particular attention because they prefer local symmetries that are…

软凝聚态物质 · 物理学 2011-11-24 Amir Haji-Akbari , Michael Engel , Sharon C. Glotzer

One versatile route to the creation of two-dimensional crystal structures on the nanometer to micrometer scale is the self-assembly of colloidal particles at an interface. Here, we explore the crystal phases that can be expected from the…

软凝聚态物质 · 物理学 2020-05-29 Etienne Fayen , Anuradha Jagannathan , Giuseppe Foffi , Frank Smallenburg

Quasi-crystals are aperiodic structures that present crystallographic properties which are not compatible with that of a single unit cell. Their revolutionary discovery in a metallic alloy, less than three decades ago, has required a full…

We develop a method to design tunable quasiperiodic structures of particles suspended in a fluid by controlling standing acoustic waves. One application of our results is to ultrasound directed self-assembly, which allows fabricating…

偏微分方程分析 · 数学 2024-09-20 Elena Cherkaev , Fernando Guevara Vasquez , China Mauck

Quasicrystals are nonperiodic structures having no translational symmetry but nonetheless possessing long-range order. The material properties of quasicrystals, particularly their low-temperature behavior, defy easy description. We present…

光学 · 物理学 2019-03-18 Theodore A. Corcovilos , Jahnavee Mittal

This paper continues our study of quasicrystals initiated in Part I. We propose a general mechanism for constructing quasicrystals, existing globally in time, in spatially-extended systems (partial differential equations with Euclidean…

动力系统 · 数学 2025-01-31 Ian Melbourne , Jens Rademacher , Bob Rink , Sergey Zelik

Due to their aperiodic nature, quasicrystals are one of the least understood phases in statistical physics. One significant complication they present in comparison to their periodic counterparts is the fact that any quasicrystal can be…

软凝聚态物质 · 物理学 2024-02-01 Etienne Fayen , Laura Filion , Giuseppe Foffi , Frank Smallenburg

Model sets (or cut and project sets) provide a familiar and commonly used method of constructing and studying nonperiodic point sets. Here we extend this method to situations where the internal spaces are no longer Euclidean, but instead…

数学物理 · 物理学 2019-07-17 Michael Baake , Robert V. Moody , Martin Schlottmann

We investigate the use of quasicrystals in image sampling. Quasicrystals produce space-filling, non-periodic point sets that are uniformly discrete and relatively dense, thereby ensuring the sample sites are evenly spread out throughout the…

计算机视觉与模式识别 · 计算机科学 2009-07-22 Mark Grundland , Jiri Patera , Zuzana Masakova , Neil A. Dodgson

Quasiperiodic systems are important space-filling ordered structures, without decay and translational invariance. How to solve quasiperiodic systems accurately and efficiently is of great challenge. A useful approach, the projection method…

数值分析 · 数学 2024-01-18 Kai Jiang , ShiFeng Li , Pingwen Zhang

This paper introduces a novel approach to enumerate and assess Trapping sets in quasi-cyclic codes, those with circulant sizes that are non-prime numbers. Leveraging the quasi-cyclic properties, the method employs a tabular technique to…

信息论 · 计算机科学 2024-01-29 Vasiliy Usatyuk , Yury Kuznetsov , Sergey Egorov

Any space-filling packing of spheres can be cut by a plane to obtain a space-filling packing of disks. Here, we deal with space-filling packings generated using inversive geometry leading to exactly self-similar fractal packings. First, we…

软凝聚态物质 · 物理学 2016-09-14 D. V. Stäger , H. J. Herrmann

The near-axis theory for quasi-isodynamic stellarator equilibria is reformulated in terms of geometric inputs, to allow greater control of the ``direct construction'' of quasi-isodynamic configurations, and to facilitate understanding of…

等离子体物理 · 物理学 2025-08-19 G. G. Plunk , E. Rodríguez

The conditions for forming quasicrystals and their approximants are stringent, normally requiring multiple length scales to stabilize the quasicrystalline order. Here we report an unexpected finding that the approximants and motifs of…

软凝聚态物质 · 物理学 2026-04-30 Zhehua Jiang , Jianhua Zhang , Mengyuan Zhan , Jiaqi Si , Junchao Huang , Hua Tong , Ning Xu

In this paper we present a general setting for aperiodic Jordan algebras arising from icosahedral quasicrystals that are obtainable as model sets of a cut-and-project scheme with a convex acceptance window. In these hypothesis, we show the…

环与代数 · 数学 2023-04-18 Daniele Corradetti , David Chester , Raymond Aschheim , Klee Irwin

Aperiodic (quasicrystalline) tilings, such as Penrose's tiling, can be built up from e.g. kites and darts, squares and equilateral triangles, rhombi or shield shaped tiles and can have a variety of different symmetries. However, almost all…

软凝聚态物质 · 物理学 2022-10-17 Andrew J. Archer , Tomonari Dotera , Alastair M. Rucklidge

A formalism is developed which allows to determine the locations of all local symmetry axes of three-dimensional particles with overall icosahedral symmetry. It relies on the fact that the root system of the non-crystallographic Coxeter…

生物大分子 · 定量生物学 2007-05-23 Reidun Twarock

A plethora of unconventional localization phenomena and fractal features of linear spectrum observed in quasiperiodic structures have been accompanied by a long-standing quest for the geometrical elements and structures that permit tilings…

We investigate quasicrystal-forming soft matter using a two-scale phase field crystal model. At state points near thermodynamic coexistence between bulk quasicrystals and the liquid phase, we find multiple metastable spatially localized…

斑图形成与孤子 · 物理学 2019-04-19 P. Subramanian , A. J. Archer , E. Knobloch , A. M. Rucklidge