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相关论文: Configurational entropy in $f(R,T)$ brane models

200 篇论文

Machine learning models must continuously self-adjust themselves for novel data distribution in the open world. As the predominant principle, entropy minimization (EM) has been proven to be a simple yet effective cornerstone in existing…

机器学习 · 统计学 2024-10-16 Qingyang Zhang , Yatao Bian , Xinke Kong , Peilin Zhao , Changqing Zhang

We formulate confinement in QCD as an entropic surface phenomenon. Quark and gluon quantum information is localized on a transverse entangling two-sphere of radius $R_{EE}$; at this radius the QCD vacuum -- partitioned by a hadron into…

高能物理 - 唯象学 · 物理学 2025-12-19 Kiminad A. Mamo

We study the thick brane world system constructed in the recently proposed $f(R,T)$ theories of gravity, with $R$ the Ricci scalar and $T$ the trace of the energy-momentum tensor. We try to get the analytic background solutions and discuss…

高能物理 - 理论 · 物理学 2017-02-24 Bao-Min Gu , Yu-Peng Zhang , Hao Yu , Yu-Xiao Liu

Modified gravitational forces in models that seek to explain cosmic acceleration without dark energy typically predict deviations in the abundance of massive dark matter halos. We conduct the first, simulation calibrated, cluster abundance…

宇宙学与河外天体物理 · 物理学 2009-11-06 Fabian Schmidt , Alexey Vikhlinin , Wayne Hu

The balanced partial entanglement (BPE) was observed to give the reflected entropy and the entanglement wedge cross-section (EWCS) for various mixed states in different theories \cite{Wen:2021qgx,Camargo:2022mme}. It can be calculated in…

高能物理 - 理论 · 物理学 2022-09-13 Qiang Wen , Haocheng Zhong

We discuss how, in a Universe restricted to the causal region connected to the observer, General Relativity implies the quantum nature of physical phenomena and directly leads to a string theory scenario, whose dynamics is ruled by a…

高能物理 - 理论 · 物理学 2009-02-09 Andrea Gregori

Gravitational baryogenesis is one of the mechanisms which help us to explore more about our early universe, especially baryon-anti-baryon asymmetry. As we know, modified theories of gravity are very successful in describing the present…

广义相对论与量子宇宙学 · 物理学 2023-05-23 Sai Swagat Mishra , Sanjay Mandal , P. K. Sahoo

Estimating the Generalization Error (GE) of Deep Neural Networks (DNNs) is an important task that often relies on availability of held-out data. The ability to better predict GE based on a single training set may yield overarching DNN…

机器学习 · 计算机科学 2022-07-20 Angus Galloway , Anna Golubeva , Mahmoud Salem , Mihai Nica , Yani Ioannou , Graham W. Taylor

Using the cosmological date sets, the cosmological parameters are constrained in this paper, with some well known form of Hubble parameter. To understand the dynamics of the Weyl type $f(Q,T)$, functional form $f(Q,T)$ has been introduced,…

广义相对论与量子宇宙学 · 物理学 2024-09-05 Rahul Bhagat , B. Mishra

We compute the matching conditions for a general thick codimension 2 brane, a necessary previous step towards the investigation of gravitational phenomena in codimension 2 braneworlds. We show that, provided the brane is weakly curved, they…

高能物理 - 理论 · 物理学 2008-11-26 Ignacio Navarro , Jose Santiago

We introduce an exactly solvable lattice model that reveals a universal finite-size scaling law for configurational entropy driven purely by geometry. Using exact enumeration via Burnside's lemma, we compute the entropy for diverse 1D, 2D,…

统计力学 · 物理学 2025-07-29 Youshen Wu , Xin Guan , Shengli Zhang , Lei Zhang

This paper provides tight bounds on the R\'enyi entropy of a function of a discrete random variable with a finite number of possible values, where the considered function is not one-to-one. To that end, a tight lower bound on the R\'enyi…

信息论 · 计算机科学 2018-12-11 Igal Sason

Observational entropy provides a general notion of quantum entropy that appropriately interpolates between Boltzmann's and Gibbs' entropies, and has recently been argued to provide a useful measure of out-of-equilibrium thermodynamic…

量子物理 · 物理学 2023-05-09 Francesco Buscemi , Joseph Schindler , Dominik Šafránek

In this work, we study a codimension-one thick brane within the framework of $f(Q,\mathcal{T})$ modified symmetric teleparallel gravity, where $Q$ is the nonmetricity scalar and $\mathcal{T}$ is the trace of the energy-momentum tensor.…

广义相对论与量子宇宙学 · 物理学 2025-03-12 Fernando M. Belchior , Roberto V. Maluf , Carlos Alberto S. Almeida

We consider a brane-universe in the background of an Anti-de Sitter/ Schwarschild geometry. We show that the induced geometry of the brane is exactly given by that of a standard radiation dominated FRW-universe. The radiation is represented…

高能物理 - 理论 · 物理学 2014-11-18 Ivo Savonije , Erik Verlinde

This work examines the cosmological implications of two functional forms of $f(R,T) = R + \alpha T^n$ gravity: for two different value of $n $ where $n=1$ and $n\neq 1$, and $\alpha$ and $n$ are free parameters. The modified Friedmann…

宇宙学与河外天体物理 · 物理学 2026-02-24 Mustapha Lamaaoune

Deep convolutional neural networks (CNNs) have been shown to be able to fit a random labeling over data while still being able to generalize well for normal labels. Describing CNN capacity through a posteriori measures of complexity has…

机器学习 · 计算机科学 2020-03-10 Konstantinos Pitas , Andreas Loukas , Mike Davies , Pierre Vandergheynst

The atomic cluster expansion (ACE) efficiently parameterizes complex energy surfaces of pure elements and alloys. Due to the local nature of the many-body basis, ACE is inherently local or semilocal for graph ACE. Here, we employ…

材料科学 · 物理学 2024-11-07 Matteo Rinaldi , Anton Bochkarev , Yury Lysogorskiy , Ralf Drautz

Modern neural network performance typically improves as model size increases. A recent line of research on the Neural Tangent Kernel (NTK) of over-parameterized networks indicates that the improvement with size increase is a product of a…

机器学习 · 计算机科学 2020-06-18 Etai Littwin , Ben Myara , Sima Sabah , Joshua Susskind , Shuangfei Zhai , Oren Golan

We study the growth of subhorizon perturbations in brane-induced gravity using perturbation theory. We solve for the linear evolution of perturbations taking advantage of the symmetry under gauge transformations along the extra-dimension to…

宇宙学与河外天体物理 · 物理学 2009-11-10 Roman Scoccimarro