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  • SCL Seminar by Milan Radonjic
    recently also in London 2 Thermal relaxation of the dye molecules due to interaction with the solvent gives rise to Bose Einstein distribution of the microcavity photons in the experiment These equilibrium properties could recently be understood within the framework of a non equilibrium description 3 4 We will critically analyze and extend this description by including coherent coupling of dye molecules and microcavity photons influenced by the solvent in addition to dissipative coupling that leads to the thermalization Interestingly our preliminary results indicate that the strong interaction of the dye molecules with the solvent favors the thermalization dynamics and makes possible Bose Einstein condensation of photons On the other hand weak solvent influence promotes the coherent dynamics and enables the formation of laser like state Depending on the values of experimental parameters different optical cavity modes may become macroscopically occupied The onset of the latter behavior has recently been noticed in a simplistic two mode laser model 5 that can be seen as a minimalistic precursor of the detailed model of photon condensation References 1 J Klaers J Schmitt F Vewinger and M Weitz Nature London 468 545 2010 2 J Marelic and R A Nyman Phys Rev A

    Original URL path: http://www.scl.rs/news/984-scl-seminar-by-m-radonjic (2016-02-09)
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  • SCL Seminar by Nenad Vukmirovic
    der Waals interactions in contrast to covalently bonded conventional inorganic semiconductors This difference leads to richness of organic semiconductor physics where the effects of electron phonon interaction disorder and electron hole interaction play a very prominent role In this talk I will review our results that provide deeper insight into the role of these effects We find that in small molecule based organic crystals electron phonon interaction is not sufficiently strong to lead to formation of localised small polarons On the other hand in quantum dot arrays electron phonon interaction localizes the carriers to single dots and charge carrier transport takes place by small polaron hopping between adjacent dots although the transport is not thermally activated In amorphous conjugated polymers the effects of disorder lead to localisation of carriers and thermally activated electrical transport Activation energy for conductivity is much smaller at high frequencies than for DC transport At the interface between the material domains in small molecule based organic crystals formation of interface trap states in the band gap of the material takes place while such states do not exist in materials based on conjugated polymers Finally we find that in photoexcited organic semiconductors formation of bound excitons occurs

    Original URL path: http://www.scl.rs/news/983-scl-seminar-by-nvukmirovic (2016-02-09)
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  • SCL Seminar by Marija Mitrović Dankulov
    entitled How random are complex networks will be given by Dr Marija Mitrović Dankulov Scientific Computing Laboratory Institute of Physics Belgrade Abstract of the talk Every complex systems can be represented as a complex network where network nodes represent units of the system while links represent interactions between them These networks are neither of regular or random structure but rather an intricate combination of order and disorder Scientists have developed large set of different topological measures for characterization and description of different structural properties of real networks It turns out that these statistical measures are not independent i e many properties appear as a statistical consequence of relatively small number of fixed topological properties in real network Here we explore this dependence using the method of dk series to six real networks representing different complex systems 1 We find that many important local and global topological properties of networks are closely reproduced by dk random graphs whose degree distributions degree correlations and clustering are as in the corresponding real network 1 C Orsini M Mitrovic et al Nat Commun 6 2015 8627 News 12 February 2016 SCL Seminar by Jelena Smiljanic 12 January 2016 In memoriam Nikola Buric 28 December

    Original URL path: http://www.scl.rs/news/981-scl-seminar-by-marija-mitrovic-dankulov (2016-02-09)
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  • SCL Seminar by Daniel Cocks
    in dense fluids modelling localisation through mesoscopic fluctuation capture will be given by Daniel Cocks College of Science Technology and Engineering James Cook University Townsville Australia Abstract of the talk While transport in dilute gases can be accurately modeled with the Boltzmann equation or Monte Carlo sampling techniques transport in dense fluids i e liquids or dense gases is usually considered with poor gas like approximations which can differ by orders of magnitude I will present a brief overview of our group s recent work into developing non equilbrium kinetic theories which include full time and spatial dependence and which are completely ab initio I will then outline a new method that describes the process of fluctuation capture whereby light particles become trapped as quasi particles in bubbles or clusters in the fluid e g electron solvation To our knowledge this process has never before been treated quantitatively and in non equilibrium in a kinetic theory I will show how our general theory has the ability to predict a threshold behaviour at both low and high densities and which can be applied for any molecular species News 12 February 2016 SCL Seminar by Jelena Smiljanic 12 January 2016 In memoriam

    Original URL path: http://www.scl.rs/news/982-scl-seminar-by-daniel-cocks (2016-02-09)
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  • Petar Tadić at the Scientific congress of students of Faculty of Physics, UoB
    will be held at the Amphitheater of Faculty of Physics room 661 on December 5 2015 starting at 11 o clock Petar will give a talk about his results and work during the summer internship in Scientific Computing Laboratory The title of the talk is Structural properties of complex networks News 12 February 2016 SCL Seminar by Jelena Smiljanic 12 January 2016 In memoriam Nikola Buric 28 December 2015 SCL

    Original URL path: http://www.scl.rs/news/980-petar-tadic-at-the-scientific-congress-of-students (2016-02-09)
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  • SCL
    by Jelena Smiljanic 12 January 2016 In memoriam Nikola Buric 28 December 2015 SCL Seminar by Milos Radonjic 25 December 2015 SCL Seminar by Milan Radonjic 18 December 2015 SCL Seminar by Nenad Vukmirovic 11 December 2015 SCL Seminar by

    Original URL path: http://www.scl.rs/component/content/?id=354&Itemid=20 (2016-02-09)
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  • SCL
    by Jelena Smiljanic 12 January 2016 In memoriam Nikola Buric 28 December 2015 SCL Seminar by Milos Radonjic 25 December 2015 SCL Seminar by Milan Radonjic 18 December 2015 SCL Seminar by Nenad Vukmirovic 11 December 2015 SCL Seminar by

    Original URL path: http://www.scl.rs/component/content/?id=527&Itemid=15 (2016-02-09)
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  • SCL
    by Jelena Smiljanic 12 January 2016 In memoriam Nikola Buric 28 December 2015 SCL Seminar by Milos Radonjic 25 December 2015 SCL Seminar by Milan Radonjic 18 December 2015 SCL Seminar by Nenad Vukmirovic 11 December 2015 SCL Seminar by

    Original URL path: http://www.scl.rs/component/content/?id=501&Itemid=53 (2016-02-09)
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