Browsing by Author "Nica, Iurie"

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    Dinamica hamiltonică optică şi haosul determinist al excitonilor coerenţi la cuplarea acestora în biexcitoni [Articol]
    (CEP USM, 2009) Şura, Costel; Rotaru, Anatol; Gereghi, Theodor; Nica, Iurie
    The Hamiltonian optic dynamics of coherent excitons and biexcitons was investigated at exciton excitation from the ground state and coupling of two excitons into a biexciton. The system of differential equations was obtained that describes the quasiparticle evolution. The computer simulation was curried out. The scenario of coherent motion breakdown and Hamiltonian chaos appearance was found. The parameter values were determined at which Hamiltonian dynamicchaos occurs
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    Dinamica ultrascurtă a excitonilor coerenţi sub acţiunea câmpului electromagnetic extern [Articol]
    (CEP USM, 2008) Şura, Costel; Rotaru, Anatol; Gereghi, Theodor; Nica, Iurie
    Appearance of ultrashort dynamic chaos of excitons was investigated under the action of the external electromagnetic field in condensed media. The system of differential equations that describes the system evolution and the numeric solutions of the system were obtained. Different regimes of oscillations were observed to occur depending on the system parameters. The parameter values were determined at which ultrashort dynamic chaos can be observed
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    TRANZIŢII CONFORMAŢIONALE LA INTERACŢIUNEA CÂMPULUI ELECTROMAGNETIC DE FRECVENŢĂ EXTREM DE ÎNALTĂ CU BIOMACROMOLECULELE INTRACELULARE
    (CEP, 2007) Rotaru, Anatol; Ciobanu, Nelu; Nica, Iurie; Gereghi, Theodor; Caireac, Leonid
    In this paper, the nonlinear dynamics of Bose-condensed phonons and millimeter electromagnetic field have been invest-tigated under the influence of external coherent electromagnetic radiation. The phases trajectories and time evolutions for different form of impulses were analyzed.