199 citations
- Sofia University "St. Kliment Ohridski"BG36 papers
- Bulgarian Academy of SciencesBG13 papers
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- University of Chemical Technology and MetallurgyBG5 papers
- University of TübingenDE4 papers
- Hellenic Naval AcademyGR3 papers
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7 papers · 1 filter
Self-Compression and Controllable Guidance of Multi-Millijoule Femtosecond Laser Pulses
I. G. Koprinkov, M. D. Todorov, M. E. Todorova +1
Self-compression of multi-millijoule femtosecond laser pulses and dramatic increase of the peak intensity are found in pressurized helium and neon within a range of intensity in wh…
Scalar-tensor black holes coupled to Euler-Heisenberg nonlinear electrodynamics
Ivan Zh. Stefanov, Stoytcho S. Yazadjiev, Michail D. Todorov
The no-scalar-hair conjecture rules out the existence of asymptotically flat black holes with a scalar dressing for a large class of theories. No-scalar-hair theorems have been pro…
Phases of 4D Scalar-tensor black holes coupled to Born-Infeld nonlinear electrodynamics
Ivan Zh. Stefanov, Stoytcho S. Yazadjiev, Michail D. Todorov
Recent results show that when non-linear electrodynamics is considered the no-scalar-hair theorems in the scalar-tensor theories (STT) of gravity, which are valid for the cases of…
Analytical form of current-voltage characteristic of parallel-plane, cylindrical and spherical ionization chambers with homogeneous ionization
Dimitar G. Stoyanov
The elementary processes taking place in the formation of charged particles and their flow in parallel-plane, cylindrical and spherical ionization chambers are considered. On the b…
Current-voltage characteristic of parallel-plane ionization chamber with inhomogeneous ionization
Dimitar G. Stoyanov
The balances of particles and charges in the volume of parallel-plane ionization chamber are considered. Differential equations describing the distribution of current densities in…
Scalar-tensor black holes coupled to Born-Infeld nonlinear electrodynamics
Ivan Zh. Stefanov, Stoytcho S. Yazadjiev, Michail D. Todorov
The non-existence of asymptotically flat, neutral black holes and asymptotically flat, charged black holes in the Maxwell electrodynamics, with non-trivial scalar field has been pr…