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The Negative Differential Conductivity and Transient Negative Mobilityeffects in xenon gas are analyzed by a first-principles particle simulationtechnique and via an approximate solution of the Boltzmann transport equation(BE). The particle simulation method is devoid of the approximations that aretraditionally adopted in the BE solutions in which (i) the distributionfunction is searched for in a two- term form, (ii) the Coulomb part of thecollision integral for the anisotropic part of the distribution function isneglected, (iii) Coulomb collisions are treated as binary events, and (iv) therange of the electron-electron interaction is limited to a cutoff distance. Theresults obtained from the two methods are, for both effects, in goodqualitative agreement, small differences are attributed to the approximationslisted above.

First-principles particle simulation and Boltzmann equation analysis of  Negative Differential Conductivity and Transient Negative Mobility effects in  xenon