Quantum Kinetic Theory of Laser Plasmas

Kremp, D.; Bornath, Th.; Hilse, P.; Haberland, H.; Schlanges, M.; Bönitz, M.

doi:10.1002/1521-3986(200103)41:2/3<259::aid-ctpp259>3.0.co;2-l

Cited by 11 publications

(6 citation statements)

References 8 publications

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“…Thus, in either case, In A is conventionally taken to be independent o f the ponderom otive velocity vq = E q/ u) and the field strength E(). As a consequence, for a given n p, Te, and &>, one finds that vej initially rem ains alm ost constant [22,26,[32][33][34] with increasing uo/uth up to som e value o f i>o/uth, then decreases as v jj2 w hen vq/ vx^ 1 (see Fig. 1 in Ref.…”

Section: Introductionmentioning

confidence: 99%

Anomalous collisional absorption of laser pulses in underdense plasma at low temperature

Kundu

2015

Phys. Rev. E

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In a previous paper [M. Kundu, Phys. Plasmas 21, 013302 (2014)], fractional collisional absorption (α) of laser light in underdense plasma was studied by using a classical scattering model of electron-ion collision frequency ν(ei), where total velocity v=√[v(th)(2)+v(0)(2)] (with v(th) and v(0) as the thermal and the ponderomotive velocity of an electron) dependent Coulomb logarithm lnΛ(v) was shown to be responsible for the anomalous (unconventional) increase of ν(ei) and α(∝ν(ei)) with the laser intensity I(0) up to a maximum value about an intensity I(c) in the low temperature (T(e)<15eV) regime and a conventional ≈I(0)(-3/2) decrease when I(0)≫I(c). One may object that the anomalous increase in ν(ei) and α were partly due to the artifact introduced in lnΛ through the maximum cutoff distance b(max)∝v. In this work, we show similar anomalous increase in ν(ei) and α versus I(0) (in the low temperature and underdense density regime) with more accurate quantum and classical kinetic models of ν(ei) without using lnΛ, but with a proper choice of the total velocity dependent inverse cutoff length k(max)∝v(2) (classical) or k(max)∝v (quantum). For a given I(0)<5×10(14)Wcm(-2), ν(ei) versus T(e) also exhibits so far unnoticed identical anomalous increase as ν(ei) versus I(0), even if the conventional k(max)∝v(th)(2) or k(max)∝v(th) (without v(0)) is chosen. The total velocity dependent k(max) in the kinetic models, as proposed here, is found to explain the anomalous increase of α with I(0) measured in some earlier laser-plasma experiments.

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Section: Introductionmentioning

confidence: 99%

Anomalous collisional absorption of laser pulses in underdense plasma at low temperature

Kundu

2015

Phys. Rev. E

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“…3, 4, 12, and 13, ln K was taken independent of the field strength E 0 , and remained as a constant for a given n; T e , and x. As a consequence, the collision frequency ei and the corresponding fractional absorption a (defined as the ratio of the absorbed energy to the incident laser energy) of the laser pulse initially decrease slowly (or remain almost constant 2,8,[14][15][16] with the increasing v 0 =v th up to some value of v 0 =v th , then decrease as v À3 0 when v 0 =v th ) 1 (see Fig. 1 in Ref.…”

mentioning

confidence: 99%

“…In all other works, [1][2][3][4]9,[12][13][14] the timedependency in the collision frequency was ignored, and an average ei was used which can be obtained from the BM when ei ðtÞ is averaged with the oscillatory energy v 2 os ðtÞ=2 [using v os ðtÞ ¼ v 0 sinðxtÞ] of an electron over one laser period T 0 ¼ 2p=x. In the limit of v 0 =v th ( 1, the BM was found to reproduce the results of Silin.…”

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confidence: 99%

Collisional absorption of laser light in under-dense plasma: The role of Coulomb logarithm

Kundu

2014

Physics of Plasmas

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“…In order to compare the kinetic and fluid results, we expand Eqs. ( 38) and (44) in powers of the wave number k and retain terms up to k 4 . We obtain:…”

Section: Fluid Theorymentioning

confidence: 99%

“…The resulting fluid equations are much more involved that their spinless counterparts, but may find useful applications, in condensed-matter physics, to the emerging field of spintronics [33], and in plasma physics to the study of highly polarized electron beams [81,82]. Quantum fluid theory finds further applications to the dense plasmas produced in the interaction of solid targets with intense laser beams [44], to warm dense matter experiments [23],…”

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confidence: 99%

Fluid descriptions of quantum plasmas

Manfredi¹,

Hervieux²,

Hurst³

2021

Preprint

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Quantum fluid (or hydrodynamic) models provide an attractive alternative for the modeling and simulation of the electron dynamics in nanoscale objects. Compared to more standard approaches, such as density functional theory or phase-space methods based on Wigner functions, fluid models require the solution of a small number of equations in ordinary space, implying a lesser computational cost. They are therefore well suited to study systems composed of a very large number of particles, such as large metallic nanoobjects. They can be generalized to include the spin degrees of freedom, as well as semirelativistic effects such as the spin-orbit coupling. Here, we review the basic properties, advantages and limitations of quantum fluid models, and provide some examples of their applications.Keywords Solid-state plasmas • Quantum hydrodynamics • Vlasov and Wigner equations • Nanoplasmonics. Introduction -Fluid models for classical and quantum plasmasRecent decades have witnessed a remarkable surge of interest for the electronic properties of nano-scale objects, particularly when excited by electromagnetic radiation [11,53,54,78]. This is a very vast domain of research that encompasses

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Quantum Kinetic Theory of Laser Plasmas

Abstract: A quantum kinetic equation for plasmas in laser fields is presented. Nonequilibrium properties like the electron-ion collision frequency and collisional absorption are calculated on the basis of a numerical solution of this equation as well as using perturbation theory.

Cited by 11 publications

References 8 publications

Anomalous collisional absorption of laser pulses in underdense plasma at low temperature

Anomalous collisional absorption of laser pulses in underdense plasma at low temperature

Collisional absorption of laser light in under-dense plasma: The role of Coulomb logarithm

Fluid descriptions of quantum plasmas

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