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A method is proposed for studying wave and particle transport in disordered waveguide systems of dimension higher than unity by means of exact one-dimensionalization of the dynamic equations in the mode representation. As a particular case,…

无序系统与神经网络 · 物理学 2013-01-31 Yu. V. Tarasov

We investigate the effects of general non-magnetic quenched disorder on a two-dimensional spin-density-wave (SDW) quantum critical metallic system and discuss how a clean SDW non-Fermi liquid state becomes modified, based on a…

强关联电子 · 物理学 2022-12-29 Iksu Jang , Ki-Seok Kim

We present a renormalization group study of two dimensional arrays of oscillators, with dissipative, short range interactions. We consider the case of non-identical oscillators, with distributed intrinsic frequencies within the array and…

统计力学 · 物理学 2009-11-13 G. Migliorini

We consider critical eigenstates in a two dimensional quasicrystal and their evolution as a function of disorder. By exact diagonalization of finite size systems we show that the evolution of properties of a typical wave-function is…

无序系统与神经网络 · 物理学 2023-03-08 Anuradha Jagannathan , Marco Tarzia

Electronic transport properties of the disordered quantum wires are considered. The disorder is introduced via impurities (point scatterers), distributed uniformly over the two-dimensional strip, which represents a model quantum wire.…

介观与纳米尺度物理 · 物理学 2014-12-31 Robert Gębarowski

A two-dimensional lattice model for d-wave superconductor with chiral symmetry is studied. The field theory at the band center is shown to be in the universality class of U(2n)/O(2n) and U(2n) nonlinear sigma model for the system with…

无序系统与神经网络 · 物理学 2007-05-23 T. Fukui

In this paper, we investigate the ground state of two-dimensional disordered cylinders which contain spinless, interacting electrons using the Hartree-Fock approximation. Calculations of the deviation of the polarization from uniformity…

凝聚态物理 · 物理学 2007-05-23 A. Kambili , H. Fehrmann , C. J. Lambert , J. H. Jefferson

We study the transport properties of interacting electrons in a disordered quantum wire within the framework of the Luttinger liquid model. We demonstrate that the notion of weak localization is applicable to the strongly correlated…

无序系统与神经网络 · 物理学 2007-05-23 I. V. Gornyi , A. D. Mirlin , D. G. Polyakov

We study numerically the dynamics of a one-electron wave packet in a two-dimensional random lattice with long-range correlated diagonal disorder in the presence of a uniform electric field. The time-dependent Schr\"{o}dinger equation is…

无序系统与神经网络 · 物理学 2007-05-23 F. A. B. F. de Moura , M. L. Lyra , F. Dominguez-Adame , V. A. Malyshev

We present a machine learning approach that allows to characterize the disorder potential of a two-dimensional electronic system from its quantum transport properties. Numerically simulated transport data for a large number of disorder…

无序系统与神经网络 · 物理学 2021-09-13 Gaëtan J. Percebois , Dietmar Weinmann

The elastic scattering cross sections for a slow electron by C2 and H2 molecules have been calculated within the framework of the non-overlapping atomic potential model. For the amplitudes of the multiple electron scattering by a target the…

原子物理 · 物理学 2017-10-04 A S Baltenkov , A Z Msezane

Motivated by recent experimental realizations of programmable spin models with long-range interactions, we investigate the non-equilibrium dynamics of the Power-of-Two (PWR2) model. This model consists of sparse long-range couplings between…

无序系统与神经网络 · 物理学 2026-03-05 Kunal Singh , Sayan Choudhury

The $N$-color Ashkin-Teller model corresponds to $N$ Ising models coupled by four-spin interactions. We consider the two-dimensional case in presence of quenched disorder and use scale invariant scattering theory to determine all the…

统计力学 · 物理学 2026-05-29 Youssef Makoudi , Gesualdo Delfino

Spatially confined rigid membranes reorganize their morphology in response to the imposed constraints. A crumpled elastic sheet presents a complex pattern of random folds focusing the deformation energy while compressing a membrane resting…

By event-driven molecular dynamics simulations we investigate magneto-transport in a two-dimensional model with randomly distributed scatterers close to the field-induced localization transition. This transition is generated by percolating…

介观与纳米尺度物理 · 物理学 2015-12-14 Walter Schirmacher , Benedikt Fuchs , Felix Höfling , Thomas Franosch

The effect of disorder on magnonic transport in low-dimensional magnetic materials is studied in the framework of a classical spin model. Numerical investigations give insight into scattering properties of the systems and show the existence…

介观与纳米尺度物理 · 物理学 2015-07-24 Martin Evers , Cord A. Müller , Ulrich Nowak

Neutron scattering is frequently used to look for evidence of features indicative of quantum-entangled phases of matter such as continua from fractionalisation or quantised excitations. However, the non-specificity of these features and…

强关联电子 · 物理学 2025-01-08 Harry Lane , Kipton Barros , Martin Mourigal

We study the strong localization of atomic matter waves in a disordered potential created by atoms pinned at the nodes of a lattice, for both three-dimensional (3D) and two-dimensional (2D) systems. The localization length of the matter…

量子气体 · 物理学 2015-05-19 Mauro Antezza , Yvan Castin , David Hutchinson

Quantum hydrodynamic (QHD) model of charged spin-1/2 particles contains physical quantities defined for all particles of a species including particles with spin-up and with spin-down. Different population of states with different spin…

等离子体物理 · 物理学 2015-04-01 Pavel A. Andreev

We study the disorder-induced localisation transition in a three-dimensional network model that belongs to symmetry class C. The model represents quasiparticle dynamics in a gapless spin-singlet superconductor without time-reversal…

介观与纳米尺度物理 · 物理学 2013-05-29 M. Ortuño , A. M. Somoza , J. T. Chalker