Exploració per autor "Lutsyshyn, Yaroslav"

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    • 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 ...