Results 21 to 30 of about 217,704 (247)

Renormalization of Discrete Models without Background [PDF]

, 2002
Conventional renormalization methods in statistical physics and lattice quantum field theory assume a flat metric background. We outline here a generalization of such methods to models on discretized spaces without metric background.
Oeckl, Robert
core   +4 more sources

Altered whole-brain resting-state functional connectivity and brain network topology in typhoon-related post-traumatic stress disorder

Therapeutic Advances in Psychopharmacology, 2023
Background: Altered resting-state functional connectivity has been found in patients with post-traumatic stress disorder (PTSD). However, the alteration of resting-state functional connectivity at whole-brain level in typhoon-traumatized individuals with
Hui Juan Chen, Jun Ke, Jie Qiu, Qiang Xu, Yuan Zhong, Guang Ming Lu, Yanglei Wu, Rongfeng Qi, Feng Chen   +8 more
doaj   +1 more source

QSD IV : 2+1 Euclidean Quantum Gravity as a model to test 3+1 Lorentzian Quantum Gravity [PDF]

, 1997
The quantization of Lorentzian or Euclidean 2+1 gravity by canonical methods is a well-studied problem. However, the constraints of 2+1 gravity are those of a topological field theory and therefore resemble very little those of the corresponding ...
, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Carlip S Lectures in (2 + 1)-dimensional gravity, Carlip S The statistical mechanics of the three-dimensional Euclidean black hole, Lewandowski J, Marolf D, Mikovic A, T Thiemann, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T A length operator for canonical quantum gravity   +19 more
core   +2 more sources

Entanglement entropy and edge modes in topological string theory. Part I. Generalized entropy for closed strings

Journal of High Energy Physics, 2021
Progress in identifying the bulk microstate interpretation of the Ryu-Takayanagi formula requires understanding how to define entanglement entropy in the bulk closed string theory.
William Donnelly, Yikun Jiang, Manki Kim, Gabriel Wong   +3 more
doaj   +1 more source

Topological K-theory of affine Hecke algebras [PDF]

, 2018
Let H(R,q) be an affine Hecke algebra with a positive parameter function q. We are interested in the topological K-theory of H(R,q), that is, the K-theory of its C*-completion C*_r (R,q).
Solleveld, Maarten
core   +2 more sources

A topological invariant of line arrangements [PDF]

, 2014
We define a new topological invariant of line arrangements in the complex projective plane. This invariant is a root of unity defined under some combinatorial restrictions for arrangements endowed with some special torsion character on the fundamental ...
Bartolo, Enrique Artal, Florens, Vincent, Guerville-BallÉ, Benoît   +2 more
core   +1 more source

Effective Field Theory and Integrability in Two-Dimensional Mott Transition [PDF]

, 2010
We study the Mott transition in a two-dimensional lattice spinless fermion model with nearest neighbors density-density interactions. By means of a two-dimensional Jordan-Wigner transformation, the model is mapped onto the lattice XXZ spin model, which ...
Affleck, Alvarez-Gaume, Amit, Barci, Barci, Baxter, Bazhanov, Bazhanov, Bos, Bos, Cappelli, Davies, Di Francesco, Diamantini, Dunne, Dunne, Federico L. Bottesi, Floreanini, Fradkin, Fradkin, Fradkin, Gaite, Georges, Gomez, Grensing, Guillermo R. Zemba, Kogan, Laughlin, Lieb, Luther, Lutter, Lüscher, Martson, Mott, Oganesyan, Pasquier, Sato, Schulz, Sergeev, Sergeev, Sergeev, Shankar, Sugawara, Tikofsky, Tsvelik, Voit, Witten, Witten, Zamolodchikov, Zamolodchikov, Zamolodchikov   +50 more
core   +3 more sources

New Epistemological Perspectives on Quantitative Methods: An Example Using Topological Data Analysis

Studies in Engineering Education, 2021
Background: Education researchers use quantitative methodologies to examine generalizable correlational trends or causal mechanisms in phenomena or behaviors.
Allison Godwin, Brianna Benedict, Jacqueline Rohde, Aaron Thielmeyer, Heather Perkins, Justin Major, Herman Clements, Zhihui Chen   +7 more
doaj   +1 more source

Altered Brain Functional Connectivity and Topological Structural in Girls with Idiopathic Central Precocious Puberty: A Graph Theory Analysis Based on Resting-State fMRI

Children
Objectives: This study aimed to investigate changes in brain functional connectivity (FC) and topological structure in girls with idiopathic central precocious puberty (ICPP) using complex network theory analysis. Methods: Resting-state fMRI data from 53
Lu Tian, Yan Zeng, Helin Zheng, Jinhua Cai   +3 more
doaj   +1 more source

Multi-trace correlators from permutations as moduli space

Journal of High Energy Physics, 2019
We study the n-point functions of scalar multi-trace operators in the U(N c ) gauge theory with adjacent scalars, such as N $$ \mathcal{N} $$ = 4 super Yang-Mills, at tree-level by using finite group methods.
Ryo Suzuki
doaj   +1 more source