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We have developed the anisotropic heat transport equation for rotating neutron stars. With a simple model of neutron star, we also model the propagation of heat pulses result from transient energy releases inside the star. Even in slow…

Astrophysics · Physics 2007-05-23 C. Y. Hui , K. S. Cheng

Light springs are space-time beams that have a helical wavepacket. Due to this special property, light springs result into a rotating pulse when intercepting a plane lying orthogonal to their propagation direction. Associated to this, we…

The latest breakthroughs in time-varying photonics are fueling novel thermal emission phenomena, for example, showing that the dynamic amplification of quantum vacuum fluctuations, induced by the time-modulation of material properties,…

We find a solution of the wave equation in the paraxial approximation that describes the attosecond pulses with spatiotemporal helical structure in the phase and in the intensity recently generated by means of highly nonlinear optical…

Optics · Physics 2019-09-25 Miguel A. Porras

Coherent light beams composed of ultrashort pulses are now increasingly used in different fields of Science, from time-resolved spectroscopy to plasma physics. Under the effect of even simple optical components, the spatial properties of…

Optics · Physics 2013-05-30 H. Vincenti , F. Quéré

The heating of the electronic distribution of a copper photocathode due to an intense drive laser pulse is calculated under the two-temperature model using fluences and pulse lengths typical in RF photoinjector operation. Using the finite…

Accelerator Physics · Physics 2018-03-14 J. Maxson , P. Musumeci , L. Cultrera , S. Karkare , H. Padmore

The evolution of electron wavepackets determines the course of many physical and chemical phenomena and attosecond spectroscopy aims to measure and control such dynamics in real-time. Here, we investigate radial electron wavepacket motion…

Atomic Physics · Physics 2015-09-04 Niranjan Shivaram , Xiao-Min Tong , Henry Timmers , Arvinder Sandhu

Strong coupling between plasmons and excitons gives rise to new hybrid polariton states with various fields of potential applications. Despite a plethora of research on plasmon--exciton systems, their transient behaviour is not yet fully…

Optics · Physics 2023-06-13 Felix Stete , Matias Bargheer , Wouter Koopman

It occurs that when we attempt to melt the nucleon in order to obtain the free quark gas, or QGP fluid the mass of the heat quantum (heaton) is equal to the pi-meson mass. Key words: Heat quanta; Quantum heat transport; Quantum diffusion…

Nuclear Theory · Physics 2007-05-23 M. Kozlowski , J. Marciak-Kozlowska

Attosecond science promises to reveal the most fundamental electronic dynamics occurring in matter and it can develop further by meeting two linked technological goals related to high-order harmonic sources: higher photon flux (permitting…

The laser-ion acceleration in the ultra-short and ultra-intense laser-matter interactions attracts more and more interest nowadays. Since electrons gain relativistic energy from laser pulse in a period of several femtoseconds and driven…

Plasma Physics · Physics 2008-12-18 Yongsheng Huang , Yuanjie Bi , Naiyan Wang , Xiuzhang Tang , Zhe Gao

We illustrate how attosecond light pulses can be used to directly mapping out the time-dependence of the correlated motion of two excited atomic electrons, discuss how the two-electron correlations manifest themselves in realistic…

Atomic Physics · Physics 2007-05-23 Toru Morishita , Shinichi Watanabe , C. D. Lin

A generalization of ``Termo Field Dynamics'' to a curved geometry is proposed. In particular a neutral scalar field minimally coupled to gravity is considered as matter content in a Robertson-Walker metric. A non linear amplification in the…

High Energy Physics - Theory · Physics 2014-11-18 Carlos E. Laciana

Parton propagation in dense nuclear matter results in elastic, inelastic and coherent multiple soft scattering with the in-medium color charges. Such scattering leads to calculable modifications of the hadron production cross section that…

High Energy Physics - Phenomenology · Physics 2015-06-25 Ivan Vitev

A theoretical model is developed for the interaction of intense femtosecond laser pulses with solid targets on the basis of the two-temperature equation of state for an irradiated substance. It allows the description of the dynamics of the…

An ab initio molecular dynamics study of femtosecond laser processing of germanium is presented in this paper. The method based on the finite temperature density functional theory is adopted to probe the structural change, thermal motion of…

Computational Physics · Physics 2016-02-02 Pengfei Ji , Yuwen Zhang

The complex Ginzburg-Landau equation has been used extensively to describe various non-equilibrium phenomena. In the context of lasers, it models the dynamics of a pulse by averaging over the effects that take place inside the cavity.…

Pattern Formation and Solitons · Physics 2009-11-13 Gino Biondini

Using time- and angle-resolved photoemission spectroscopy, we study the response of metallic single layer TaS$_2$ in the 1H structural modification to the generation of excited carriers by a femtosecond laser pulse. A complex interplay of…

We demonstrate that electrons can be efficiently accelerated to high energy in spatially non-uniform, intense laser fields. Laser non-uniformities occur when a perfect plane wave reflects off a randomly perturbed surface. By solving for…

Plasma Physics · Physics 2020-10-05 Mark Sherlock

The heating effect of terahertz pulse with various frequencies and intensities on the heavy water solution is investigated using the molecular dynamics simulation. Resonant absorptions are found for both heavy water and light water, but at…

Chemical Physics · Physics 2017-01-23 Rong-Yao Yang , Zi-Qian Huang , Si-Na Wei , Qi-Lin Zhang , Wei-Zhou Jiang
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