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The computational complexity of internal diffusion-limited aggregation (DLA) is examined from both a theoretical and a practical point of view. We show that for two or more dimensions, the problem of predicting the cluster from a given set…

凝聚态物理 · 物理学 2007-05-23 Cristopher Moore , Jonathan Machta

We present new elemental abundance studies of seven damped Lyman-alpha systems (DLAs). Together with the four DLAs analyzed in Dessauges-Zavadsky et al. (2004), we have a sample of eleven DLA galaxies with uniquely comprehensive and…

天体物理学 · 物理学 2009-11-11 M. Dessauges-Zavadsky , J. X. Prochaska , S. D'Odorico , F. Calura , F. Matteucci

In order to interpret H2 (molecular hydrogen) quasar absorption line observations of damped Ly-alpha systems (DLAs) and sub-DLAs, we model their H2 abundance as a function of dust-to-gas ratio, including H2 self-shielding and dust…

天体物理学 · 物理学 2009-11-10 H. Hirashita , A. Ferrara

We have recently presented evidence that in configurations dominating the regularized pure-glue QCD path integral, the topological charge density constructed from overlap Dirac operator organizes into an ordered space-time structure. It was…

高能物理 - 格点 · 物理学 2008-11-26 I. Horvath , A. Alexandru , J. B. Zhang , Y. Chen , S. J. Dong , T. Draper , F. X. Lee , K. F. Liu , N. Mathur , S. Tamhankar , H. B. Thacker

We discuss how the inclusion of singular gauge fields in the partition function for QCD can lead to a domain-like picture for the QCD vacuum by virtue of specific conditions on quantum fluctuations at the singularities. With a simplified…

高能物理 - 唯象学 · 物理学 2017-08-23 A. C. Kalloniatis , S. N. Nedelko

To interpret H_2 quasar absorption line observations in Damped Ly-alpha clouds (DLAs), we model the H_2 spatial distribution within a DLA. Based on numerical simulations of disk structures with parameters similar to those derived for such…

天体物理学 · 物理学 2009-11-07 H. Hirashita , A. Ferrara , K. Wada , P. Richter

A computational approach by an implementation of the Principle Component Analysis (PCA) with K-means and Gaussian Mixture (GM) clustering methods from Machine Learning (ML) algorithms to identify structural and dynamical heterogeneities of…

统计力学 · 物理学 2023-09-01 Viet Nguyen , Xueyu Song

We present a local density approximation (LDA) for one-dimensional (1D) systems interacting via the soft-Coulomb interaction based on quantum Monte-Carlo calculations. Results for the ground-state energies and ionization potentials of…

强关联电子 · 物理学 2015-05-27 N. Helbig , J. I. Fuks , M. Casula , M. J. Verstraete , M. A. L. Marques , I. V. Tokatly , A. Rubio

In this contribution we report on recent extension of one dimensional dipole cascade models to account for saturation and transition to vacuum \cite{Kutak:2025syp}. We analyze properties of the models using Quantum Information tools.…

高能物理 - 唯象学 · 物理学 2025-11-24 Krzysztof Kutak , Michał Praszałowicz

Collective response dynamics of a strongly coupled system departs from the continuum phase upon transition to the quasicrystalline phase, or formation of a Wigner lattice. The wave nonlinearity leading to the modulational instability in…

等离子体物理 · 物理学 2023-01-25 Sandip Dalui , Prince Kumar , Devendra Sharma

As a consequence of QCD factorization theorems, a wide variety of inclusive and exclusive cross sections may be formulated in terms of a universal colour dipole cross section at small $x$. It is well known that for small transverse size…

高能物理 - 唯象学 · 物理学 2011-09-13 M. McDermott , L. Frankfurt , V. Guzey , M. Strikman

We start from the QED Lagrangian to describe a charged many-particle system coupled to the radiation field. A covariant density matrix approach to kinetic theory of QED plasmas, subjected to a strong external electro-magnetic field has…

量子物理 · 物理学 2009-11-07 A. Hoell , V. G. Morozov , G. Roepke

We examine the generalized leading-logarithmic approximation (LLA) equations for compound states of n-reggeized gluons. It is shown that in multi-color QCD, when $N_c \rightarrow \infty$, these equations have a sufficient number of…

高能物理 - 唯象学 · 物理学 2007-05-23 L. N. Lipatov , A. Berera

The LSDA+U approach to density functional theory is carefully reanalyzed. Its possible link to single-particle Green's function theory is occasionally discussed. A simple and elegant derivation of the important sum rules for the on-site…

强关联电子 · 物理学 2009-11-10 H. Eschrig , K. Koepernik , I. Chaplygin

Molecular dynamics simulations have been performed to investigate in detail collective modes spectra of two-dimensional Coulomb fluids in a wide range of coupling. The obtained dispersion relations are compared with theoretical approaches…

等离子体物理 · 物理学 2018-10-11 S. A. Khrapak , N. P. Kryuchkov , L. A. Mistryukova , A. G. Khrapak , S. O. Yurchenko

In this paper, we present a more detailed version of our previous work for three-particle correlations in quark and gluon jets [1]. We give theoretical results for this observable in the double logarithmic approximation and the modified…

高能物理 - 唯象学 · 物理学 2015-05-27 Redamy Perez Ramos , Vincent Mathieu , Miguel-Angel Sanchis-Lozano

Certain many-particle Hardy inequalities are derived in a simple and systematic way using the so-called ground state representation for the Laplacian on a subdomain of $\mathbb{R}^n$. This includes geometric extensions of the standard Hardy…

数学物理 · 物理学 2015-04-14 Douglas Lundholm

The stratified structure of the configuration space $\mb G^N = G \times ... \times G$ reduced with respect to the action of $G$ by inner automorphisms is investigated for $G = SU(3) .$ This is a finite dimensional model coming from lattice…

高能物理 - 理论 · 物理学 2009-11-10 S. Charzyński , J. Kijowski , G. Rudolph , M. Schmidt

A detailed comparison is made between the topological structure of quenched QCD as revealed by the recently proposed over-improved stout-link smearing in conjunction with an improved gluonic definition of the topological density on one hand…

高能物理 - 格点 · 物理学 2014-11-18 E. -M. Ilgenfritz , D. Leinweber , P. Moran , K. Koller , G. Schierholz , V. Weinberg

The two-dimensional one-component plasma, i.e. the system of point-like charged particles embedded in a homogeneous neutralizing background, is studied on the surface of a cylinder of finite circumference, or equivalently in a semiperiodic…

统计力学 · 物理学 2016-08-31 L. Samaj , J. Wagner , P. Kalinay