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Wyszukujesz frazę "Prvanović, S." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Gaussian-Induced Rotation in Triangular Photonic Lattices
    Autorzy:
    Jović, D.
    Prvanović, S.
    Jovanović, R.
    Petrović, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047884.pdf
    Data publikacji:
    2007-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.65.Tg
    42.65.Sf
    Opis:
    Time-dependent rotation of counterpropagating mutually incoherent self-trapped Gaussian beams in periodic optically induced fixed photonic lattices is numerically investigated. Rotation occurs for some values of control parameters. For parameters of such rotation, the solitonic solutions are found using modified Petviashvili's method. It is shown that they correspond to the lowest values of propagation constant in the power diagrams and relation between observed rotation and less confined discrete solitonic solutions are demonstrated.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 5; 1067-1072
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geometric Phase for Analytically Solvable Driven Time-Dependent Two-Level Quantum Systems
    Autorzy:
    Mendaš, I.
    Burić, N.
    Popović, D.
    Prvanović, S.
    Radonjić, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1204876.pdf
    Data publikacji:
    2014-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    03.65.Aa
    03.65.Vf
    07.05.Dz
    Opis:
    Geometric phase for novel analytical solutions (Barnes and Das Sarma) of time-dependent two-level quantum systems is discussed, specifically for a general single-axis driving term, which is represented by a function J(t) in the Hamiltonian, and its corresponding evolution operator. It is demonstrated how general results for corresponding phases (total, dynamic and geometric) can be obtained. Using a specific case, it was found that over time in which the driving field is appreciably different from zero, the corresponding geometric phase changes (in the specific example by Δ β ≈ 0.8 radians) thus enabling detection. The results are relevant to qubit control and to quantum computing applications.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 3; 670-672
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Counterpropagating Matter Waves in Optical Lattices
    Autorzy:
    Prvanović, S.
    Jović, D.
    Jovanović, R.
    Strinić, A.
    Belić, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1791206.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    03.75.Lm
    Opis:
    An investigation of Bose-Einstein condensate in two-dimensional optical lattice potentials, formed by laser beams, is carried out. We are interested in the dynamics of Bose-Einstein condensate in a square optical lattice, where the periodic potential can lead to the stabilization of an otherwise unstable Bose-Einstein condensate. The behavior of Bose-Einstein condensate in optical lattices is described by the nonlinear Gross-Pitaevskii equation, which we treat numerically. By applying the Petviashvili iteration method, we demonstrate the existence of solitonic solutions in the case of counterpropagating matter waves, and analyze their stability.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 507-509
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dancing Light: Counterpropagating Beams in Photorefractive Crystals
    Autorzy:
    Belić, M.
    Petrović, M.
    Jović, D.
    Strinić, A.
    Arsenović, D.
    Prvanović, S.
    Jovanović, R.
    Petrović, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1814046.pdf
    Data publikacji:
    2007-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.65.Tg
    42.65.Sf
    Opis:
    A review of work on the dynamical behavior of counterpropagating incoherent laser beams in photorefractive crystals is presented. Numerical study of counterpropagating beams of different type is carried out, in both space and time, using an appropriate theoretical model. The development of patterns in broad hyper-Gaussian counterpropagating beams in saturable Kerr-like media is investigated, by varying the width of beams. Rotational properties of counterpropagating mutually incoherent self-trapped vortex beams in optically induced fixed photonic lattices are also investigated numerically. One of the fundamental quantum mechanical phenomena is observed for the counterpropagating beams in photonic lattices, the tunneling of light from the first to the higher-order bands of the lattice band gap spectrum. The transfer of angular momentum from vortex beams to optically induced photonic lattices is also demonstrated. For the interacting beams it is found that the sum of angular momenta of counterpropagating components is not a conserved quantity, but the difference is. In the fixed lattices there is always a considerable loss of angular momentum.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 5; 729-736
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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