40 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Bulgarian Academy of SciencesBG13 papers
- Institute for Nuclear Research and Nuclear EnergyBG10 papers
- Institute of Mathematics and InformaticsBG6 papers
- Sofia University "St. Kliment Ohridski"BG3 papers
- National Research Nuclear University MEPhIRU2 papers
- P.N. Lebedev Physical Institute of the Russian Academy of SciencesRU2 papers
- University of BayreuthDE2 papers
- Dublin Institute of TechnologyIE1 paper
- Institut de Mathématiques de BourgogneFR1 paper
- ITMO UniversityRU1 paper
- Joint Institute for Nuclear ResearchRU1 paper
- Lviv Polytechnic National UniversityUA1 paper
17 papers
High-harmonic generation in zinc oxide subjected to intense mid-infrared femtosecond laser pulse
Boyan Obreshkov, Tzveta Apostolova
We theoretically investigate photo-excitation of electron-hole pairs and high harmonic generation in the bulk of zinc oxide (ZnO) subjected to intense femto-second laser pulses wit…
The Geometry of -arcs
Sascha Kurz, Ivan Landjev, Francesco Pavese +1
In this paper, we give a geometric construction of the three strong non-lifted -arcs in of respective sizes 128, 143, and 168, and construct an…
Classification of arcs in
Sascha Kurz, Ivan Landjev, Assia Rousseva
The proof of the non-existence of Griesmer -codes is just one of many examples where extendability results are used. In a series of papers Landjev and Rousseva have…
Femtosecond optical breakdown in silicon
Tzveta Apostolova, Boyan Obreshkov
We investigate photoinization, energy deposition, plasma formation and the ultrafast optical breakdown in crystalline silicon irradiated by intense near-infrared laser pulses with…
Multicomponent Fokas-Lenells equations on Hermitian symmetric spaces
Vladimir S. Gerdjikov, Rossen I. Ivanov
Multi-component integrable generalizations of the Fokas-Lenells equation, associated with each irreducible Hermitian symmetric space are formulated. Description of the underlying s…
The human visual system and CNNs can both support robust online translation tolerance following extreme displacements
Ryan Blything, Valerio Biscione, Ivan I. Vankov +2
Visual translation tolerance refers to our capacity to recognize objects over a wide range of different retinal locations. Although translation is perhaps the simplest spatial tran…
Blueshift of high-order harmonic generation in crystalline silicon subjected to intense femtosecond near-infrared laser pulse
Boyan Obreshkov, Tzveta Apostolova
We present the generation of high order harmonics in crystalline silicon subjected to intense near-infrared 30fs laser pulse. The harmonic spectrum extends from the near infrared t…
Recursion operators and the hierarchies of MKdV equations related to , and Kac-Moody algebras
V. S. Gerdjikov, A. A. Stefanov, I. D. Iliev +4
We constructed the three nonequivalent gradings in the algebra . The first one is the standard one obtained with the Coxeter automorphism $C_1=S_{α_2} S_{α_1}S_{α…
Ultrafast energy absorption and photoexcitation of bulk plasmon in crystalline silicon subjected to intense near-infrared ultrashort laser pulses
Tzveta Apostolova, Boyan Obreshkov, Iaroslav Gnilitskyi
We investigate the non-linear response and energy absorption in bulk silicon irradiated by intense 12-fs near-infrared laser pulses. Depending on the laser intensity, we distinguis…
New Mathematical Models of GPS Intersatellite Communications in the Gravitational Field of the Near-Earth Space
Bogdan G. Dimitrov
Several space missions such as GRACE, GRAIL, ACES and others rely on intersatellite communications (ISC) between two satellites at a large distance one from another. The main goal…
Two null gravitational cones in the theory of GPS-intersatellite communications between two moving satellites. I. Physical and mathematical theory of the space-time interval and the geodesic distance on intersecting null cones
Bogdan G. Dimitrov
Several space missions such as GRACE, GRAIL, ACES and others rely on intersatellite communications (ISC) between two satellites at a large distance one from another. The main goal…
Sub-cycle dynamics of electron-hole pairs and high-harmonic generation in bulk diamond subjected to intense femtosecond laser pulse
T. Apostolova, B. Obreshkov
We present calculation of photoexcitation and high-harmonic generation in bulk diamond induced by intense near-infrared laser pulse of photon energy 1.55 eV, time duration of 15 fs…
Ultrafast photoionization and excitation of surface-plasmon-polaritons on diamond surfaces
Tzveta Apostolova, B. D. Obreshkov, A. A. Ionin +4
Ultrafast plasmonics of novel materials has emerged as a promising field of nanophotonics bringing new concepts for advanced optical applications. Ultrafast electronic photoexcitat…
Kulish-Sklyanin type models: integrability and reductions
Vladimir S. Gerdjikov
We start with a Riemann-Hilbert problem (RHP) related to a BD.I-type symmetric spaces , . We consider two Riemann-Hilbert problems: t…
High harmonic generation from bulk diamond driven by intense femtosecond laser pulse
Tzveta Apostolova, Boyan Obreshkov
We present theoretical results on the high-harmonic generation (HHG) in bulk diamond induced by intense laser pulse of wavelength 800 nm and duration 15 fs. For laser intensity in…
On integrable wave interactions and Lax pairs on symmetric spaces
Vladimir S. Gerdjikov, Georgi G. Grahovski, Rossen I. Ivanov
Multi-component generalizations of derivative nonlinear Schrodinger (DNLS) type of equations having quadratic bundle Lax pairs related to Z_2-graded Lie algebras and A.III symmetri…
Magnetic moments in odd-A Cd isotopes and coupling of particles with zero-point vibrations
S. Mishev, V. V. Voronov
Background: The coupling of the last nucleon with configurations in the ground state of the even-even core is known to augment the single quasiparticle fragmentation pattern. In a…