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  • Publication details - IFISC
    additional freedom of the optical phase We explore the consequences of this additional Goldstone mode and analyze experimentally and numerically frequency and phase locking of laser cavity solitons in a vertical cavity surface emitting laser with frequency selective feedback Due to growth related variations of the cavity resonance the translational symmetry is usually broken in real devices Pinning to different defects means that separate laser cavity solitons have different frequencies

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2341 (2016-02-15)
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  • Publication details - IFISC
    the thermodynamic limit with reference to the XY model and the finite two qubit Heisenberg model Although this model has been the subject of active entanglement research the bulk of the pertinent work refers to finite instantiations As a consequence the temperature cannot be properly defined in such circumstances a problem that is overcome here Our effort should be of interest because quantum discord notion DOI 10 1142 S0219749913500032 Fitxers

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2402 (2016-02-15)
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  • Publication details - IFISC
    approach In this method the edge state at a given energy is built as a superposition of evanescent waves It is shown that the superposition can not always satisfy the required boundary condition thus restricting the existence of edge modes We discuss purely 1D and 2D systems focusing in the latter case on the effect of the Rashba mixing term DOI 10 1103 PhysRevB 87 075440 Fitxers Tornar a la

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2484 (2016-02-15)
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  • Publication details - IFISC
    agents with different opinions perform a single task to make a consensual product As a function of the convergence parameter describing the influence of the product on the agents the model shows spontaneous symmetry breaking of the final consensus opinion represented by the medium For the case when agents are replaced with new ones at a certain rate a transition from mainly consensus to a perpetual conflict occurs which is

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2335 (2016-02-15)
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  • Publication details - IFISC
    the Kondo effect and superconductivity In the first type type I the coupling is strong and the Kondo effect is dominant Levels of the Andreev bound states display anticrossing in the middle of the ridge On the other hand crossing of the two Andreev bound states is shown in the second type type II together with the 0 π transition of the Josephson junction Our scenario is well understood in

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2508 (2016-02-15)
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  • Publication details - IFISC
    bound expressible in terms of the energy s expectation value and the energy s standard deviation that yields a quantum speed limit Composite quantum systems need entanglement in order to achieve this limit So far most studies on the connection between entanglement and the quantum speed limit have focused on the case of non interacting systems The connection between quantum speed and entanglement is systematically investigated here for the case

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2403 (2016-02-15)
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  • Publication details - IFISC
    Hohenberg equation display oscillations and Type I and II excitability when adding inhomogeneities and drift to the system This rich dynamical behavior arises from the interplay between the pinning to the inhomogeneity and the pulling of the drift The scenario presented here provides a general theoretical understanding of oscillatory regimes of dissipative solitons reported in semiconductor microresonators Our results open also the possibility to observe this phenomenon in a wide

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2344 (2016-02-15)
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  • Publication details - IFISC
    members of the community but also form organically as members interact Due to their importance they have been studied widely e g community detection evolution activity etc One of the key questions for understanding how such groups evolve is whether there are different types of groups and how they differ In Sociology theories have been proposed to help explain how such groups form In particular the common identity and common bond theory states that people join groups based on identity i e interest in the topics discussed or bond attachment i e social relationships The theory has been applied qualitatively to small groups to classify them as either topical or social We use the identity and bond theory to define a set of features to classify groups into those two categories Using a dataset from Flickr we extract user defined groups and automatically detected groups obtained from a community detection algorithm We discuss the process of manual labeling of groups into social or topical and present results of predicting the group label based on the defined features We directly validate the predictions of the theory showing that the metrics are able to forecast the group type with high accuracy In

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2490 (2016-02-15)
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