Results 121 to 130 of about 63,806 (262)

A simple model for the evolution of a non-Abelian cosmic string network

, 2016
In this paper we present the results of numerical simulations intended to study the behavior of non-Abelian cosmic strings networks. In particular we are interested in discussing the variations in the asymptotic behavior of the system as we variate the ...
Cella, G., Pieroni, M.
core   +3 more sources

Structure‐Aware Machine Learning for Polymers: A Hierarchical Graph Network for Predicting Properties From Statistical Ensembles

Macromolecular Rapid Communications, EarlyView.
This work presents a structure‐aware graph convolutional network that models polymers as statistical ensembles to predict macroscopic properties. By combining topologically realistic graphs generated via kinetic Monte Carlo simulations with explicit molar mass distributions, the framework achieves high accuracy in classifying architectures and ...
Julian Kimmig, Yannik Köster, Timo Koswig, Punith Raviswamy, Subhash V. S. Ganti, Stefan Zechel, Christopher Kuenneth, Ulrich S. Schubert   +7 more
wiley   +1 more source

From Stability to Chaos: A Complete Classification of the Damped Klein‐Gordon Dynamics

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT We investigate the transition between stability and chaos in the damped Klein‐Gordon equation, a fundamental model for wave propagation and energy dissipation. Using semigroup methods and spectral criteria, we derive explicit thresholds that determine when the system exhibits asymptotic stability and when it displays strong chaotic dynamics ...
Carlos Lizama, Marina Murillo‐Arcila, Julio Puerta‐Fernández   +2 more
wiley   +1 more source

Electromagnetic vacuum fluctuations around a cosmic string in de Sitter spacetime

European Physical Journal C: Particles and Fields, 2017
The electromagnetic field correlators are evaluated around a cosmic string in background of $$(D+1)$$ ( D + 1 ) -dimensional dS spacetime assuming that the field is prepared in the Bunch–Davies vacuum state.
A. A. Saharian, V. F. Manukyan, N. A. Saharyan   +2 more
doaj   +1 more source

Knotlike Cosmic Strings in The Early Universe

, 2003
In this paper, the knotlike cosmic strings in the Riemann-Cartan space-time of the early universe are discussed. It has been revealed that the cosmic strings can just originate from the zero points of the complex scalar quintessence field.
] L.H. Kauffman, A. Gangui, A.A. Kozhevnikov, A.J. Niemi, A.M. Polyakov, A.M. Saitta, B. Fain, D. Rolfsen, E. Witten, J.A. Schouten, L.B. Fu, R.P. Feynman, S. Deser, S. Hanany, S.S. Chern, W.F. Pohl, Xin Liu, Y.S. Duan, Yi-shi Duan, É. Goursat   +19 more
core   +1 more source

Open string diagrams I: Topological type

Journal of Mathematical Physics, 1993
An arbitrary Feynman graph for string field theory interactions is analyzed and the homeomorphism type of the corresponding world sheet surface is completely determined even in the nonorientable cases. Algorithms are found to mechanically compute the topological characteristics of the resulting surface from the structure of the signed oriented graph ...
Nag, Subhashis, Sankaran, Parameswaran
openaire   +2 more sources

Weak Solutions for a Class of Nonlocal Singular Problems Over the Nehari Manifold

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT In this paper, we consider a nonlocal model of dilatant non‐Newtonian fluid with a Dirichlet boundary condition. By using the Nehari manifold and fibering map methods, we obtain the existence of at least two weak solutions, with sign information.
Zhenfeng Zhang, Calogero Vetro, Tianqing An   +2 more
wiley   +1 more source

Exploring the Reproductive Toxicity of Bisphenol S Through a Network Toxicology and Molecular Docking Analysis

Pediatric Discovery, EarlyView.
Utilizing network toxicology, molecular docking, and dynamic simulations to investigate the potential reproductive toxicity of bisphenol S (BPS). ABSTRACT The aim of this study was to investigate the potential reproductive toxicity of bisphenol S (BPS) and the related molecular mechanisms through a network toxicology approach.
Siyuan Wang, Yan Fu, Xu Huang, Qitong Guo, Xiangqin Zheng, Shengde Wu, Lianju Shen, Guanghui Wei   +7 more
wiley   +1 more source

Quantum curves as quantum distributions

Journal of High Energy Physics, 2019
Topological strings on toric Calabi-Yau threefolds can be defined non-perturbatively in terms of a non-interacting Fermi gas of N particles. Using this approach, we propose a definition of quantum mirror curves as quantum distributions on phase space ...
Marcos Mariño, Szabolcs Zakany
doaj   +1 more source

Super-Chern-Simons Theory as Superstring Theory

, 2004
Superstrings and topological strings with supermanifolds as target space play a central role in the recent developments in string theory. Nevertheless the rules for higher-genus computations are still unclear or guessed in analogy with bosonic and ...
Grassi, P. A., Policastro, G.
core