15 citations · 34 across the 7 of their papers we have counts for
7 papers
Generation, interaction and reduction of filaments as a nonlinear process
L. M. Kovachev, D. A. Georgieva, N. Nedyalkov
The absence of ionization and observation of white continuum in the initial moment of filamentation of powerful femtosecond laser pulses, propagating in silica glasses, as well as…
Nonlinear mechanisms to Rogue events in the process of interaction between optical filaments
L. M. Kovachev, D. A. Georgieva
We investigate two types of nonlinear interaction between collinear femtosecond laser pulses with power slightly above the critical for self-focusing . In the first case we…
Energy transfer between two filaments due to degenerate four-photon parametric process
Daniela A. Georgieva, Lubomir M. Kovachev
Recently energy exchange between two filaments crossing at small angle and with power slightly above the critical for self-focusing was experimentally demonstrated. In thi…
Shock wave in Euler - Heisenberg - Köckel nonlinear vacuum
Lubomir M. Kovachev, Daniela A. Georgieva, Kamen L. Kovachev
An analytical approach to the theory of electromagnetic waves in nonlinear vacuum is developed. The evolution of the pulse is governed by a system of nonlinear wave vector equation…
Born-Infeld black holes coupled to a massive scalar field
Ivan Zh. Stefanov, Daniela A. Georgieva, Stoytcho S. Yazadjiev +1
Born-Infeld black holes in the Scalar-Tensor Theories of Gravity, in the case of massless scalar field, have been recently obtained. The aim of the current paper is to study the ef…
Unstable even-parity eigenmodes of the regular static SU(2) Yang-Mills-dilaton solutions
O. I. Streltsova, E. E. Donets, E. A. Hayryan +2
In this paper we obtain unstable even-parity eigenmodes to the static regular spherically symmetric solutions of the SU(2) Yang-Mills-dilaton coupled system of equations in 3+1 Min…