• Elastic constants of incommensurate solid 4He from diffusion Monte Carlo simulations 

    Cazorla Silva, Claudio; Lutsyshyn, Yaroslav; Boronat Medico, Jordi (2013-06-28)
    Article
    Accés obert
    We study the elastic properties of incommensurate solid 4He in the limit of zero temperature. Specifically, we calculate the pressure dependence of the five elastic constants (C11, C12, C13, C33, and C44), longitudinal and ...
  • On the stability of small vacancy clusters in solid 4He 

    Lutsyshyn, Yaroslav; Rota, Riccardo; Boronat Medico, Jordi (2011-03)
    Article
    Accés restringit per política de l'editorial
    We study numerically properties of multiple vacancies in solid 4He at zero temperature. Up to four vacancies were introduced into the solid through incommensuration between the number of available lattice sites and the ...
  • Quantum phase transition with a simple variational ansatz 

    Lutsyshyn, Yaroslav; Astrakharchik, Grigori; Cazorla, C; Boronat Medico, Jordi (2014-12-11)
    Article
    Accés obert
    We study the zero-temperature quantum phase transition between liquid and hcp solid He-4. We use the variational method with a simple yet exchange-symmetric and fully explicit wave function. It is found that the optimized ...