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We have developed a novel method to describe superradiance and related cooperative and collective effects in a closed form. Using the method we derive a two-atom master equation in which any complexity of atomic levels, semiclassical…

Quantum Physics · Physics 2007-05-23 S. F. Yelin , M. Kostrun , Tun Wang , M. Fleischhauer

We have studied natural purity $^{4}$He single crystals and polycrystals between 10 and 600 mK using a torsional oscillator with a 2 cm$^{3}$ rigid cell made of sapphire with a smooth geometry. As the temperature was lowered, we observed…

Other Condensed Matter · Physics 2015-06-03 A. D. Fefferman , X. Rojas , A. Haziot , S. Balibar , J. T. West , M. H. W. Chan

Event shape observables have been widely used for precision QCD studies at various lepton and hadron colliders. We present the most accurate calculation of the transverse-energy-energy correlation event shape variable in deep-inelastic…

High Energy Physics - Phenomenology · Physics 2020-12-02 Hai Tao Li , Ivan Vitev , Yu Jiao Zhu

We investigate the role of tensor correlation on the structures of \nuc{4}{He} and its effect on the doublet splitting in \nuc{5}{He}. We perform a configuration mixing calculation in the shell model type bases to represent the tensor…

Nuclear Theory · Physics 2009-11-10 Takayuki Myo , Kiyoshi Kato , Kiyomi Ikeda

We study the light propagation in one-dimensional photonic crystal via nonlinear Four Wave Mixing (FWM) process. The linear and nonlinear refractive indexes are approximated with the first Fourier harmonic term. A system of the nonlinear…

Optics · Physics 2007-05-23 Maryam Boozarjmehr , Ali Rostami

We derived an exact solution of the spherically symmetric Hayward black hole surrounded by perfect fluid dark matter (PFDM). By applying the Newman-Janis algorithm, we generalized it to the corresponding rotating black hole. Then, we…

General Relativity and Quantum Cosmology · Physics 2021-12-21 Tian-Chi Ma , He-Xu Zhang , Peng-Zhang He , Hao-Ran Zhang , Yuan Chen , Jian-Bo Deng

The spectral function for an electron one-component plasma is calculated self-consistently using the GW0 approximation for the single-particle self-energy. In this way, correlation effects which go beyond the mean-field description of the…

Plasma Physics · Physics 2009-11-13 Carsten Fortmann

The 4He monopole form factor is studied by computing the transition matrix element of the electromagnetic charge operator between the 4He ground-state and the p+3H and n+3He scattering states. The nuclear wave functions are calculated using…

Nuclear Theory · Physics 2024-06-04 M. Viviani , A. Kievsky , L. E. Marcucci , L. Girlanda

We propose a new method for calculating reflection and transmission coefficients for an arbitrarily polarized electromagnetic plane wave incident on a one-dimensional dielectric medium of finite thickness and with dielectric permittivity…

Optics · Physics 2022-04-27 N. A. Vanyushkin , A. H. Gevorgyan , S. S. Golik

We study quantitatively angular correlations in the two-particle spectrum produced by an energetic probe scattering off a dense hadronic target with sizeable saturation momentum. To this end, two parton inclusive cross sections for…

High Energy Physics - Phenomenology · Physics 2009-11-11 Rudolf Baier , Alex Kovner , Marzia Nardi , Urs Achim Wiedemann

Weyl semimetals are gapless topological states of matter with broken inversion and/or time reversal symmetry, which can support unconventional responses to externally applied electrical, optical and magnetic fields. Here we report a new…

We investigate the properties of single-particle resonances in a non-spherical potential by solving the coupled-channels equations for the radial wave functions. We first generalize the box discretization method for positive energy states…

Nuclear Theory · Physics 2009-11-10 K. Hagino , Nguyen Van Giai

The news function providing some relevant information about angular distribution of gravitational radiation in axisymmetric black hole collisions at the speed of light had been evaluated in the literature by perturbation methods, after…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Giampiero Esposito , Cosimo Stornaiolo

Temperature-dependent infrared reflectivity spectra of SrFe$_{4}$Sb$_{12}$ has been measured. A renormalized Drude peak with a heavy effective mass and a pronounced pseudogap of 10 meV develops in the optical conductivity spectra at low…

Strongly Correlated Electrons · Physics 2007-05-23 Shin-ichi Kimura , Takafumi Mizuno , Hojun Im , Katsuyuki Hayashi , Eiichi Matsuoka , Toshiro Takabatake

We consider the propagation of classical and non-classical light in multi-mode optical waveguides. We focus on the evolution of the few-photon correlation functions, which, much like the light-intensity distribution in such systems, evolve…

Quantum Physics · Physics 2012-01-19 Eilon Poem , Yaron Silberberg

We present and discuss some ideas concerning an ``average-pair-density functional theory'', in which the ground-state energy of a many-electron system is rewritten as a functional of the spherically and system-averaged pair density. These…

Materials Science · Physics 2009-11-11 Paola Gori-Giorgi , Andreas Savin

The energy per particle of many body wavefunctions that mix Laughlin liquid with crystalline correlations for periodic samples in the Haldane-Rezayi configuration is numerically evaluated for periodic samples. The Monte Carlo algorithm is…

Mesoscale and Nanoscale Physics · Physics 2015-05-19 Alejandro Cabo , Francisco Claro , Danny Martinez-Pedrera

Implicit particle filtering is a sequential Monte Carlo method for data assim- ilation, designed to keep the number of particles manageable by focussing attention on regions of large probability. These regions are found by min- imizing, for…

Numerical Analysis · Mathematics 2015-05-30 Matthias Morzfeld , Alexandre J. Chorin

In this paper, we present numerical and experimental evidence of directional wave behavior, i.e. beaming and diffraction, along high-order rotational symmetries of quasicrystalline elastic metamaterial plates. These structures are obtained…

Applied Physics · Physics 2022-01-31 Danilo Beli , Matheus Inguaggiato Nora Rosa , Carlos De Marqui , Massimo Ruzzene

We study a one-dimensional particles system, in the overdamped limit, where nearest particles attract with a force inversely proportional to a power of their distance and coalesce upon encounter. The detailed shape of the distribution…

Statistical Mechanics · Physics 2010-01-25 Daniel ben-Avraham , Oleksandr Gromenko , Paolo Politi