Enviaments recents

  • Gapped spectrum in pair-superfluid bosons 

    Astrakharchik, Grigori; Zillich, Robert E.; Mazzanti Castrillejo, Fernando Pablo; Boronat Medico, Jordi (2016-12-22)
    Article
    Accés obert
    We study the ground state of a bilayer system of dipolar bosons with dipoles oriented by an external field perpendicularly to the two parallel planes. By decreasing the interlayer distance, for a fixed value of the strength ...
  • Structure and dynamics of water at carbon-based interfaces 

    Martí Rabassa, Jordi; Calero, Carles; Franzese, Giancarlo (2017-03-21)
    Article
    Accés obert
    Water structure and dynamics are affected by the presence of a nearby interface. Here, first we review recent results by molecular dynamics simulations about the effect of different carbon-based materials, including ...
  • Topological structure and the H index in complex networks 

    Pastor Satorras, Romualdo; Castellano, Claudio (2017-02-03)
    Article
    Accés obert
    The generalized H(n) Hirsch index of order n has been recently introduced and shown to interpolate between the degree and the K-core centrality in networks. We provide a detailed analytic characterization of the properties ...
  • One-dimensional multicomponent Fermi gas in a trap: quantum Monte Carlo study 

    Matveeva, N.; Astrakharchik, Grigori (2016-06-22)
    Article
    Accés obert
    A one-dimensional world is very unusual as there is an interplay between quantum statistics and geometry, and a strong short-range repulsion between atoms mimics Fermi exclusion principle, fermionizing the system. Instead, ...
  • Maxwell equations in the Debye potential formalism 

    Fayos Vallés, Francisco; Llanta Salleras, Estanislao; Llosa, J (1985-02-01)
    Article
    Accés obert
    The authors propose a method for computing the electromagnetic test-field created by a given distribution of charges and currents using the Debye potential formalism in curved space-times. This framework has been applied ...
  • Luttinger parameter of quasi-one-dimensional para- H2 

    Ferré Porta, Guillem; Gordillo Bargueño, Maria Carmen; Boronat Medico, Jordi (2017-02-06)
    Article
    Accés obert
    We have studied the ground-state properties of para-hydrogen in one dimension and in quasi-one-dimensional configurations using the path-integral ground-state Monte Carlo method. This method produces zero-temperature exact ...
  • Structural and dipolar fluctuations in liquid water: a Car–Parrinello molecular dynamics study 

    Skarmoutsos, Ioannis; Masia, Marco; Guàrdia Manuel, Elvira (2016-03-16)
    Article
    Accés restringit per política de l'editorial
    A Car–Parrinello molecular dynamics simulation was performed to investigate the local tetrahedral order, molecular dipole fluctuations and their interrelation with hydrogen bonding in liquid water. Water molecules were ...
  • Solvation dynamics in water: 2. Energy fluxes on excited- and ground-state surfaces 

    Rey Oriol, Rosendo; Hynes, James T. (2016-11-03)
    Article
    Accés restringit per política de l'editorial
    This series’ first installment introduced an approach to solvation dynamics focused on expressing the emission frequency shift (following electronic excitation of, and resulting charge change or redistribution in, a solute) ...
  • Quantum halo states in helium tetramers 

    Stipanovic, P.; Vranješ Markic, Leandra; Boronat Medico, Jordi (2017-01-12)
    Article
    Accés restringit per política de l'editorial
    The universality of quantum halo states enables a comparison of systems from different fields of physics, as demonstrated in two- and three-body clusters. In the present work, we studied weakly bound helium tetramers in ...
  • Ground-state properties of weakly bound helium-alkali trimers 

    Stipanovic, P.; Vranješ Markic, Leandra; Zaric, D.; Boronat Medico, Jordi (2017-01-07)
    Article
    Accés restringit per política de l'editorial
    Weakly bound triatomic molecules consisting of two helium atoms and one alkali metal atom are studied by means of the diffusion Monte Carlo method. We determined the stability of 4He2A, 4He3HeA, and 3He2A, where A is one ...

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