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A comprehensive analytical theory for nonlinear excitations related to horizontal (longitudinal, acoustic mode) as well as vertical (transverse, optical mode) motion of charged dust grains in a dust crystal is presented. Different types of…

等离子体物理 · 物理学 2007-05-23 Ioannis Kourakis , Padma Kant Shukla , Bengt Eliasson

Dimensionality reduction is a crucial step for pattern recognition and data mining tasks to overcome the curse of dimensionality. Principal component analysis (PCA) is a traditional technique for unsupervised dimensionality reduction, which…

机器学习 · 计算机科学 2017-05-04 Zan Gao , Guotai Zhang , Feiping Nie , Hua Zhang

We study the fractal structure of Diffusion-Limited Aggregation (DLA) clusters on the square lattice by extensive numerical simulations (with clusters having up to $10^8$ particles). We observe that DLA clusters undergo strongly anisotropic…

统计力学 · 物理学 2017-11-08 Denis S. Grebenkov , Dmitry Beliaev

I discuss different approaches to finite density lattice QCD. In particular, I focus on the structure of the phase diagram and discuss attempts to determine the location of the critical end-point. Recent results on the transiton line as…

高能物理 - 格点 · 物理学 2008-11-26 Christian Schmidt

Computationally-efficient semilocal approximations of density functional theory at the level of the local spin density approximation (LSDA) or generalized gradient approximation (GGA) poorly describe weak interactions. We show improved…

The quantum properties of a helix-like shaped QCD string are studied in the context of the semi-classical Lund fragmentation model. It is shown how simple quantization rules combined with the causality considerations in the string…

高能物理 - 唯象学 · 物理学 2014-01-30 Sarka Todorova-Nova

The perturbative approach to structure formation has recently received a lot of attention in the literature. In such setups the final predictions for observables like the power spectrum is often derived under additional approximations such…

宇宙学与河外天体物理 · 物理学 2016-12-14 Matteo Fasiello , Zvonimir Vlah

We analyze the combined effect of the long range Coulomb (LRC) interaction and of surface energy on first order density-driven phase transitions in the presence of a compensating rigid background. We study mixed states formed by regions of…

强关联电子 · 物理学 2009-10-31 J. Lorenzana , C. Castellani , C. Di Castro

We present a geometrical description of the space of density states of a quantum system of finite dimension. After presenting a brief summary of the geometrical formulation of Quantum Mechanics, we proceed to describe the space of density…

量子物理 · 物理学 2007-07-26 J. Clemente-Gallardo , G. Marmo

A computational approach via implementation of the Principle Component Analysis (PCA) and Gaussian Mixture (GM) clustering methods from Machine Learning (ML) algorithms to identify domain structures of supercooled liquids is developed. Raw…

统计力学 · 物理学 2022-03-24 Viet Nguyen , Xueyu Song

We summarize recent developments in understanding the concept of generalized parton distributions (GPDs), its relation to nucleon structure, and its application to high-Q2 electroproduction processes. Following a brief review of QCD…

高能物理 - 唯象学 · 物理学 2009-08-24 C. Weiss

A Lagrangian density for viscous quark-gluon plasma has been constructed within the fluid-like QCD framework. Gauge symmetry is preserved for all terms inside the Lagrangian, except for the viscous term. The transition mechanism from point…

核理论 · 物理学 2014-10-15 T. P. Djun , B. Soegijono , T. Mart , L. T. Handoko

We develop a Non-Crossing Approximation (NCA) for the effective cluster problem of the recently developed Dynamical Cluster Approximation (DCA). The DCA technique includes short-ranged correlations by mapping the lattice problem onto a…

强关联电子 · 物理学 2009-10-31 Th. Maier , M. Jarrell , Th. Pruschke , J. Keller

We investigate the large-scale structure of amorphous ices and transitions between their different forms by quantifying their large-scale density fluctuations. Specifically, we simulate the isothermal compression of low-density amorphous…

统计力学 · 物理学 2017-10-04 Fausto Martelli , Salvatore Torquato , Nicolas Giovambattista , Roberto Car

The aim of the present paper is the study of the entropic elasticity of the dsDNA molecule, having a cristallographic length L of the order of 10 to 30 persistence lengths A, when it is subject to spatial obstructions. We have not tried to…

软凝聚态物质 · 物理学 2009-11-11 C. Bouchiat

A qubit lattice algorithm (QLA) is developed for Maxwell equations in a two-dimensional Cartesian geometry. In particular, the initial value problem of electromagnetic pulse scattering off a localized 2D dielectric object is considered. A…

光学 · 物理学 2022-11-09 G. Vahala , M. Soe , L. Vahala , A. K. Ram

Partition function zeros provide alternative approach to study phase structure of finite density QCD. The structure of the Lee-Yang edge singularities associated with the zeros in the complex chemical potential plane has a strong influence…

高能物理 - 格点 · 物理学 2014-09-18 Shinji Ejiri , Yasuhiko Shinno , Hiroshi Yoneyama

The structure of compact star core filled by gluon matter plasma is investigated within the fluid-like QCD framework. The energy momentum tensor, density and pressure relevant for gluonic plasma having the nature of fluid bulk of gluon sea…

高能物理 - 唯象学 · 物理学 2012-03-13 C. S. Nugroho , A. O. Latief , T. P. Djun , L. T. Handoko

We consider (1+1)-dimensional QCD coupled to scalars in the adjoint representation of the gauge group SU($N$). This model results from dimensional reduction of the (2+1)-dimensional pure glue theory. In the large-N limit we study the…

高能物理 - 理论 · 物理学 2009-10-22 Krešimir Demeterfi , Igor R. Klebanov , Gyan Bhanot

The results of a new spectroscopic survey of 66 $z \simgt 4$ quasars for Damped Lyman-alpha absorption systems are presented. The search led to the discovery of 30 new DLA candidates which are analysed in order to compute the comoving mass…

天体物理学 · 物理学 2009-10-31 Celine Peroux , Mike J. Irwin , Richard G. McMahon , Lisa J. Storrie-Lombardi