Internal versus external conductivity of a dense plasma: Many-particle theory and simulations

Reinholz, H.; Морозов, И. В.; Röpke, G.; Millat, Thomas

doi:10.1103/physreve.69.066412

Cited by 31 publications

(49 citation statements)

References 20 publications

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“…As collisions are relevant in strongly correlated systems, the dynamical collision frequency ν(ω) is derived and appears in a generalized Drude formula [51,52] …”

Section: Linear Response Theory Of Plasmas In Equilibriummentioning

confidence: 99%

Spatially resolved dynamic structure factor of finite systems from molecular dynamics simulations

et al. 2011

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The dynamical response of metallic clusters up to 10 3 atoms is investigated using the restricted molecular dynamics simulations scheme. Exemplarily, sodium like material is considered. Correlation functions are evaluated to investigate the spatial structure of collective electron excitations and optical response of laser excited clusters. In particular, the spectrum of bi-local correlation functions shows resonances representing different modes of collective excitations inside the nano plasma. The spatial structure, the resonance energy and width of the eigenmodes have been investigated for various values of electron density, temperature, cluster size and ionization degree. Comparison with bulk properties is performed and the dispersion relation of collective excitations is discussed.

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“…As collisions are relevant in strongly correlated systems, the dynamical collision frequency ν(ω) is derived and appears in a generalized Drude formula [51,52] …”

Section: Linear Response Theory Of Plasmas In Equilibriummentioning

confidence: 99%

Spatially resolved dynamic structure factor of finite systems from molecular dynamics simulations

et al. 2011

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“…These values were changed from 1/1836 to 1/100, but the changes of the results of MD simulations could be neglected. This can be very interesting, even only for the similarity of the procedures that were used here and in [41]. However, it can be particularly important under the assumption that a similar conclusion is valid in the case of plasma that contains electrons and ions of some heavy atoms, particularly if the non-negligible probability is taken into account, meaning that the value of the mentioned ratio can be even greater than 1/100.…”

Section: The Possible Ion-ion Probe Systemsmentioning

confidence: 86%

“…Concerning this, it is useful to note the fact that was established by means the molecular dynamic (MD) simulation of a dense electron-proton plasma in [41]. In this work, some characteristics of the considered plasma were determined as the results of averaging over all ion configurations possible under the considered conditions, for different values of the ratio m e /m p , where m e and m p are the electron and proton masses.…”

Section: The Possible Ion-ion Probe Systemsmentioning

confidence: 99%

The Screening Characteristics of the Dense Astrophysical Plasmas: The Three-Component Systems

Ignjatović

Srećković

Dimitrijević

2017

Atoms

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Abstract:As the object of investigation, astrophysical fully ionized electron-ion plasma is chosen with positively charged ions of two different kinds, including the plasmas of higher non-ideality. The direct aim of this work is to develop, within the problem of finding the mean potential energy of the charged particle for such plasma, a new model, self-consistent method of describing the electrostatic screening. Within the presented method, such extremely significant phenomena as the electron-ion and ion-ion correlations are included in the used model. We wish to draw attention to the fact that the developed method is suitable for astrophysical applications. Here we keep in mind that in outer shells of stars, the physical conditions change from those that correspond to the rare, practically ideal plasma, to those that correspond to extremely dense non-ideal plasma.

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“…[32] we find numerical results for the internal and external conductivities in the longwavelength limiting case, obtained from MD simulations of a xenon plasma for the same thermodynamic conditions as in the first measurement of [29,30]. As we can see in Figs.…”

Section: Comparison With Simulation Data Ofmentioning

confidence: 94%

“…Anyway, both values are inside the experimental error interval. [31] and [32] The characteristic feature of the new simulation data of [31] is the non-monotonicity of the dynamic internal conductivity beyond the domain of applicability of the DL model.…”

Section: Reflectivity Measurementsmentioning

confidence: 99%

Two‐moment modelling of the dynamic longitudinal conductivity of strongly coupled Coulomb systems

Ballester

Ткаченко

2005

Contrib. Plasma Phys.

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A dynamic longitudinal internal conductivity model, derived from the classical method of moments, is applied to the analysis of recent simulation data and reflectivity measurements of shock-compressed dense xenon plasmas. This model satisfies both the non-zero f −sum rule and the second non-zero sum rule, and reproduces the non-monotonicity of the conductivity of dense plasmas beyond the domain of applicability of the Drude-Lorentz model. The Drude-Lorentz model from the point of view of the theory of momentsThe classical model for the (internal) conductivity of dense plasmas and metals,is characterized by two static parameters, the static conductivity σ 0 = σ (ω = 0) = n e e 2 τm −1 = (4π) −1 ω 2 p τ and the relaxation time τ . Here n e is the number density of electrons in the system, −e and m are the electronic charge and mass, and ω p is the plasma frequency.In addition to direct measurements, the static conductivity value can be obtained as [1]Here σ ext (ω) is the external dynamic conductivity of the Coulomb system related to the internal conductivity through the well-known formula 1 [2]:Mathematically, the DL function, σ DL (z), is a simple Nevanlinna (response) function 2 with a single simple pole in the lower half-plane. In addition, the real part of σ DL (z) possesses a single finite frequency moment, which is known also as the f -sum rule:

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Internal versus external conductivity of a dense plasma: Many-particle theory and simulations

Cited by 31 publications

References 20 publications

Spatially resolved dynamic structure factor of finite systems from molecular dynamics simulations

Spatially resolved dynamic structure factor of finite systems from molecular dynamics simulations

The Screening Characteristics of the Dense Astrophysical Plasmas: The Three-Component Systems

Two‐moment modelling of the dynamic longitudinal conductivity of strongly coupled Coulomb systems

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