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  • Publication details - IFISC
    chaotic flows In particular we have considered a three component model of plankton dynamics advected by a meandering jet We report general results stressing the existence of a smooth filamental transition in the concentration patterns depending on the relative strength of the stirring by the chaotic flow and the relaxation properties of planktonic dynamical system Patterns obtained in open and closed flows are compared DOI 10 1016 S1464 1909 01

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=342 (2016-02-15)
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  • Publication details - IFISC
    between the relaxing deterministic dynamics and the randomizing character of the fluctuations A finite size scaling analysis of the phase transition reveals that it belongs to the universality class of the equilibrium Ising model All these results are analyzed in the light of the nonequilibrium probability distribution of the system which can be obtained analytically Our results could constitute a possible scenario of inverted phase diagrams in the so called

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=501 (2016-02-15)
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  • Publication details - IFISC
    simulation Our model contains explicitly the gain saturation and spontaneous emission terms and we focus on the effect that these terms have on the large signal modulation regime We find that the spontaneous emission term strongly modifies the qualitative behavior of the instabilities boundaries while the gain saturation factor manifests itself in the damping of relaxation oscillations and leads to a simple quantitative shift of boundaries Fitxers ar3 jpg 343863

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=380 (2016-02-15)
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  • Publication details - IFISC
    identical optically coupled semiconductor lasers exhibiting a delay in the coupling Our results give evidence for subnanosecond coupling induced synchronized chaotic dynamics in conjunction with a spontaneous symmetry breaking we find a well defined time lag between the dynamics of the two lasers and an asymmetric physical role of the subsystems We demonstrate that the leading laser synchronizes its lagging counterpart whereas the synchronized lagging laser drives the coupling induced

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=389 (2016-02-15)
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  • Publication details - IFISC
    for a reasonable choice of model parameters Both stochastic models exhibit baseline fluctuations and variations in the peak heights of Ca 2 In addition we find for one model that there is a distribution of latency times rather than a single latency time with a distribution width which is comparable to the experimental observation of spike widths We also find for the other model with low gap junction diffusion that

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=410 (2016-02-15)
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  • Publication details - IFISC
    modeled by including delayed optical fields Experiments are performed using almost identical Fabry Perot lasers coupled through the TE component As soon as the coupling strength is increased we observe fluctuations in the power dynamics that appears synchronized except for a small time lag This asymmetric operation of the perfectly symmetric system allows to differentiate between leader and laggard lasers Synchronization properties are studied making use of the synchronization plots

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=403 (2016-02-15)
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  • Publication details - IFISC
    for the switch on of different transverse modes in gain guided VCSELs We consider different active region diameters excitation conditions and current shapes Following the application of the current pulse transverse modes become excited in a quite definite sequence After the turn on the VCSEL initially switches on in the fundamental transverse mode but higher order transverse modes become excited later In general the results obtained are in qualitative agreement

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=402 (2016-02-15)
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  • Publication details - IFISC
    The methods are useful for applications to non trivial interacting systems with a large number of degrees of freedom and both short range and long range interactions The first method is quite general and it is based on the numerical evaluation of the density of states with a given energy The second method is more specific for Tsallis thermostatistics and it is based on a standard Monte Carlo Metropolis algorithm along with a numerical integration procedure We show here that both methods are robust and efficient We present results of the application of the methods to the one dimensional Ising model both in a short range case and in a long range non extensive case We show that the thermodynamic potentials for different values of the system size N and different values of the non extensivity parameter q can be described by scaling relations which are an extension of the ones holding for the Boltzmann Gibbs statistics q 1 Finally we discuss the differences in using standard or non standard mean value definitions in the Tsallis thermostatistics formalism and present a microcanonical ensemble calculation approach of the averages Submitted to Physica A 37 pages 17 figures LaTeX postscript version here

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=375 (2016-02-15)
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