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Fast robust methods for calculating likelihoods from CMB observations on small scales generally rely on approximations based on a set of power spectrum estimators and their covariances. We investigate the optimality of these approximation,…

宇宙学与河外天体物理 · 物理学 2009-11-06 Samira Hamimeche , Antony Lewis

We consider the bremsstrahlung of electrons of fully ionized plasma. Electron energy range extends from a few hundred electron volts before the extreme relativistic energies of several MeV. The results of calculations of effective slow-down…

等离子体物理 · 物理学 2011-09-20 A. Yu. Chirkov

Electron cooling is a well-established method to improve the phase space quality of ion beams in storage rings. In the common rest frame of the ion and the electron beam the ion is subjected to a drag force and it experiences a loss or a…

等离子体物理 · 物理学 2013-07-05 H. B. Nersisyan , G. Zwicknagel

It is shown in linear approximation that in the case of one-dimensional problem of transverse electron waves in a half-infinite slab of homogeneous Maxwellian collisionless plasma with the given boundary field frequency two wave branches of…

等离子体物理 · 物理学 2007-11-20 V. N. Soshnikov

We present a microscopic calculation of the electric conductivity and net-particle diffusion coefficients for a viscous and resistive ultra-relativistic plasma. Our results might be of interest for several astrophysical and cosmological…

高能物理 - 唯象学 · 物理学 2025-06-13 Ferdinando Frascà , Andrea Beraudo , Luca Del Zanna

The methods of macroscopic averaging used to derive the macroscopic Maxwell equations from electron theory are methodologically incorrect and lead in some cases to a substantial error. For instance, these methods do not take into account…

等离子体物理 · 物理学 2007-05-23 Marek A. Szalek

We investigate the strong-field ionization of atomic hydrogen in a few-cycle elliptically polarized infrared pulse by solving the time-dependent Schr\"odinger equation. The dependence of the photoelectron momentum distribution on the pulse…

原子物理 · 物理学 2022-11-30 Nicolas Douguet , Klaus Bartschat

The Coulomb log (log {\Lambda}) approximation is widely used to approximate electron transport coefficients in dense plasmas. It is a classical approximation to the momentum transport cross section. The accuracy of this approximation for…

等离子体物理 · 物理学 2018-10-17 Charles Starrett

Ultra-relativistic electromagnetic plasmas can be used for improving our understanding of the quark-gluon plasma. In the weakly coupled regime both plasmas can be described by transport theoretical and quantum field theoretical methods…

高能物理 - 唯象学 · 物理学 2015-05-13 Markus H. Thoma

The covariant, spin-dependent response tensor for an electric dipole moment polarized electron gas (statistical distribution of electrons and positrons) is calculated using the formalism of quantum plasmadynamics. A simultaneous…

高能物理 - 理论 · 物理学 2025-03-24 Victor. M. Demcsak , Donald. B. Melrose

We present the numerical simulations for an electron-beam-driven and loss-cone-driven electron-cyclotron maser (ECM) with different plasma parameters and different magnetic field strengths for a relatively small region and short time-scale…

太阳与恒星天体物理 · 物理学 2015-06-04 S. Yu , J. G. Doyle , A. Kuznetsov , G. Hallinan , A. Antonova , A. L. MacKinnon , A. Golden

We present a simple approach to the fixed phase method in Quantum Monte Carlo. This applies to electrons in molecules and electron gas and is straightforwardly extended to the Schr\"odinger equation with magnetic field.

计算物理 · 物理学 2018-02-01 F. Delyon , B. Bernu

We present first-principles calculations of the rate of energy exchanges between electrons and ions in nonequilibrium warm dense plasmas, liquid metals and hot solids, a fundamental property for which various models offer diverging…

等离子体物理 · 物理学 2019-05-29 Jacopo Simoni , Jérôme Daligault

High-throughput plasma separation based on atomic mass holds the promise for offering unique solutions to a variety of high-impact societal applications. Through the mass differential effects they exhibit, crossed-field configurations can…

等离子体物理 · 物理学 2018-12-03 R. Gueroult , S. J. Zweben , N. J. Fisch , J. -M. Rax

Following recent work, we discuss waves in a warm ideal two-fluid plasma consisting of electrons and ions starting from a completely general, ideal two-fluid dispersion relation. The plasma is characterised by five variables: the electron…

等离子体物理 · 物理学 2020-12-18 Jordi De Jonghe , Rony Keppens

We use a density-functional theoretical approach to set up a computationally simple self-consistent scheme to calculate the pair distribution functions and the effective interactions in quantum Coulomb liquids. We demonstrate the accuracy…

强关联电子 · 物理学 2007-05-23 B. Davoudi , M. Polini , R. Asgari , M. P. Tosi

Based on a model of plasma wakefield in the strongly nonlinear (bubble) regime, we develop a lowest-order perturbation theory for the components of electromagnetic fields inside and outside the bubble using the assumption of small thickness…

等离子体物理 · 物理学 2018-11-15 A. A. Golovanov , I. Yu. Kostyukov , J. Thomas , A. Pukhov

The three-dimensional evolution of a pure electron plasma is studied by means of a particle-in-cell code which solves the drift-Poisson system where kinetic effects in the motion parallel to the magnetic field are taken into account.…

等离子体物理 · 物理学 2007-05-23 Massimiliano Rome , Roberto Pozzoli , Mauro Pravettoni , Yuri Tsidulko

Low-frequency rotating spokes are obtained in a cross-field discharge plasma using two-dimensional numerical simulations. A particle-fluid hybrid model is used to model the plasma flow in a configuration similar to a Hall thruster. It has…

等离子体物理 · 物理学 2018-03-28 R. Kawashima , K. Hara , K. Komurasaki

Plasma-based acceleration schemes have attracted sustained interest as a pathway toward compact particle accelerators, owing to the large electric fields supported by plasmas. Although recent studies have demonstrated the excitation of…

等离子体物理 · 物理学 2026-02-20 Jesús E. López , Eduardo A. Orozco-Ospino