Персона: Березин, Арсений Владимирович
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Расчет и анализ сигнала поляризации вакуума в трехпучковой схеме
Разработан эффективный метод расчета числа и характеристик фотонов, излучаемых вакуумом, поляризованным перекрывающимися фокусированными лазерными импульсами. Исследована и оптимизирована зависимость сигнала от фокусировки и поляризации импульсов и обоснована возможность его детектирования на мультипетаваттной установке XCELS
Dyson - Schwinger equations in scalar electrodynamics
© 2021 Institute of Physics Publishing. All rights reserved.Counterparts of the Dyson - Schwinger equations for scalar QED in an external electromagnetic field are derived. Exact structure and diagrammatic interpretation of the corresponding mass and polarization operators are obtained. It is shown that in the presence of an external field the final equations include an exact three - photon interaction vertex.
Recalibration of LBM Populations for Construction of Grid Refinement with No Interpolation
Grid refinement is used to save computing costs while preserving high precision of fluid simulation. In the Lattice Boltzmann Method, grid refinement often uses interpolated values. We found a method, where interpolation in space and time is not required. For this purpose, we used the moment matching condition and rescaling the non-equilibrium part of populations, and developed the recalibration procedure that allows to transfer information between different LBM stencils in the simulation domain. Then, we build non-uniform lattice which uses stencils with different shapes on the transition. The resulting procedure is verified on the 2D Poisselle flow and the advected vortex benchmark. In prospect, grids with adaptive geometry can be built with the use of the proposed method.