# Quantum electron-acoustic double layers in two electron species quantum plasma

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Recently, Xu et al. [Phys. Plasmas 18, 052301 (2011)] have studied the effects of various plasma parameters on interaction of two ion-acoustic solitary waves in an unmagnetized three-dimensional electron-positron-ion quantum plasma. They have used the extended reductive perturbation technique,...

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We consider the perturbation theory in the fermion mass (chiral perturbation theory) in the two-dimensional quantum electrodynamics. With this aim, we rewrite the theory in the equivalent bosonic form in which the interaction has the exponential form and the fermion mass becomes the coupling...

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Based on the analytic invariant charge obtained from the results of the standard perturbation theory up to the four-loop approximation, we construct a ï¿½syntheticï¿½ model of the invariant charge in quantum chromodynamics. In the suggested model, the perturbative discontinuity on the...

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We solve the problem of the interaction of two quasimolecular electrons at an arbitrary distance from each other, i.e., near different atoms (nuclei). We regard the interaction as a second-order effect of the quantum electrodynamic perturbation theory in the coordinate representation. Taking the...