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We present nonparametric techniques for constructing and verifying density estimates from high-dimensional data whose irregular dependence structure cannot be modelled by parametric multivariate distributions. A low-dimensional…

Applications · Statistics 2009-07-02 Susan M. Buchman , Ann B. Lee , Chad M. Schafer

A three-dimensional semiclassical model is used to study double ionization of Ar when driven by a near-infrared and near-single-cycle laser pulse for intensities ranging from 0.85$\times$10$^{14}$ W/cm$^{2}$ to 5$\times$10$^{14}$…

Atomic Physics · Physics 2017-02-15 A. Chen , M. Kübel , B. Bergues , M. F. Kling , A. Emmanouilidou

High resolution total and indium differential atomic pair distribution functions (PDFs) for In_(0.5)Ga_(0.5)As alloys have been obtained by high energy and anomalous x-ray diffraction experiments, respectively. The first peak in the total…

Materials Science · Physics 2009-10-31 V. Petkov , I-K. Jeong , F. Mohiuddin-Jacobs , Th. Proffen , S. J. L. Billinge , W. Dmowski

2DEG states of Al/$\delta$-GaAs structures were investigated in the persistent tunneling photoconductivity (PTPC) regime at low temperatures. "Thickening" of the unoccupied subbands to the ground state of 2DEG was observed at $T=4.2$~$K$.…

Mesoscale and Nanoscale Physics · Physics 2020-08-27 S. E. Dizhur , I. N. Kotel'nikov , V. A. Kokin , F. V. Shtrom

We present a solver for the 2D high-frequency Helmholtz equation in heterogeneous, constant density, acoustic media, with online parallel complexity that scales empirically as $\mathcal{O}(\frac{N}{P})$, where $N$ is the number of volume…

Numerical Analysis · Mathematics 2017-01-03 Leonardo Zepeda-Núñez , Laurent Demanet

Accurate representation of non-Gaussian distributions of quantities of interest in nonlinear dynamical systems is critical for estimation, control, and decision-making, but can be challenging when forward propagations are expensive to carry…

Optimization and Control · Mathematics 2026-04-13 Aaron R. Liao , Kenshiro Oguri , Michele D. Carpenter

Simulation and control of the transient flow in natural gas networks involve solving partial differential equations (PDEs). This paper proposes a semi-analytical solutions (SAS) approach for fast and accurate simulation of the natural gas…

Dynamical Systems · Mathematics 2022-10-10 Xin Xu , Rui Yao , Kai Sun , Feng Qiu

Graphene pn junction is the brick to build up variety of graphene nano-structures. The analytical formula of the conductance of graphene gradual pn junctions in the whole bipolar region has been absent up to now. In this paper, we…

Mesoscale and Nanoscale Physics · Physics 2016-01-07 Mou Yang , Rui-Qiang Wang , Yan-Kui Bai

Analytical description of domain structure morphology and phase diagrams of ferroelectric nanoparticles is developed in the framework of Landau Ginzburg Devonshire approach. To model realistic conditions of incomplete screening of…

We investigate the electronic band structure of modulation-doped GaAs/AlGaAs core-shell nanowires for both n- and p-doping. We developed an 8-band Burt-Foreman k.p Hamiltonian approach to describe coupled conduction and valence bands in…

Mesoscale and Nanoscale Physics · Physics 2022-06-13 Andrea Vezzosi , Andrea Bertoni , Guido Goldoni

We generalize the concept of holography for the color superconductivity (CSC) phase by considering $d$-dimensional Anti de Sitter (AdS) space instead of the traditional 6 dimensions. The corresponding dual field theory is a gauge theory…

High Energy Physics - Theory · Physics 2024-11-20 Nguyen Hoang Vu

In this paper we demonstrate the capability of the method of Lagrangian descriptors to unveil the phase space structures that characterize transport in high-dimensional symplectic maps. In order to illustrate its use, we apply it to a…

Chaotic Dynamics · Physics 2021-11-24 M. Agaoglou , V. J. Garcia-Garrido , M. Katsanikas , S. Wiggins

We calculate the Hall viscosity and the nonlocal (i.e., dependent on wave vector $\bm q$) Hall conductivity of "gapped graphene" (a non-topological insulator with two valleys) in the presence of a strong perpendicular magnetic field. Using…

Mesoscale and Nanoscale Physics · Physics 2019-09-17 Mohammad Sherafati , Giovanni Vignale

We analytically study the critical phase of a mixed system of the U(2) gauge fields and global symmetry on the boundary using gauge/gravity. A variational minimization problem has been formulated. The numerical results pertinently show that…

High Energy Physics - Theory · Physics 2015-04-07 Davood Momeni , Muhammad Raza , Ratbay Myrzakulov

Bi-Directional Grid Constrained (BGC) stochastic processes (BGCSP) are constrained It\^{o} diffusions with the property that the further they drift away from the origin, the more resistance to movement in that direction they undergo. We…

Probability · Mathematics 2021-03-25 Aldo Taranto , Shahjahan Khan

We study the anisotropic electronic properties of 2D SnS, an analogue of phosphorene, grown by physical vapor transport. With transmission electron microscope and polarized Raman spectroscopy, we identify the zigzag and armchair directions…

Mesoscale and Nanoscale Physics · Physics 2016-12-30 Zhen Tian , Chenglei Guo , Mingxing Zhao , Ranran Li , Jiamin Xue

We suggest a simple model of disorder in graphene assuming that there are randomly distributed positive and negative centers with equal concentration $N/2$ in the bulk of silicon oxide substrate. We show that at zero gate voltage such…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 B. I. Shklovskii

Two dimensional electron gases based on SrTiO$_3$ are an intriguing platform for exploring mesoscopic superconductivity combined with spin-orbit coupling, offering electrostatic tunability from insulator to metal to superconductor within a…

Mesoscale and Nanoscale Physics · Physics 2021-10-25 Evgeny Mikheev , Ilan T. Rosen , Marc A. Kastner , David Goldhaber-Gordon

Validity of the single parameter scaling (SPS) in one dimensional Anderson model with purely off-diagonal disorder is being studied. It is shown that the localized region with standard symmetry is divided into two regimes: SPS and non-SPS.…

Disordered Systems and Neural Networks · Physics 2009-11-11 Hosein Cheraghchi

Two-dimensional (2D) post-transition metal chalcogenides (PTMC) have attracted attention due to their suitable band gaps and lower exciton binding energies, making them more appropriate for electronic, optical and water-splitting devices…

Materials Science · Physics 2020-10-22 Daniel Wines , Kayahan Saritas , Can Ataca