Now showing items 1-13 of 13

    • Elusive structure of helium trimers 

      Stipanovic, P.; Vranješ Markic, Leandra; Boronat Medico, Jordi (2016-08-23)
      Article
      Open Access
      Over the years many He–He interaction potentials have been developed, some very sophisticated, including various corrections beyond the Born–Oppenheimer approximation. Most of them were used to predict properties of helium ...
    • Finite-range effects in ultradilute quantum drops 

      Cikojevic, Viktor; Vranješ Markic, Leandra; Boronat Medico, Jordi (2020-05-27)
      Article
      Open Access
      In the first experimental realization of dilute Bose–Bose liquid drops using two hyperfine states of 39K some discrepancies between theory and experiment were observed. The standard analysis of the data using the Lee–Huang–Yang ...
    • Ground-state properties of weakly bound helium-alkali trimers 

      Stipanovic, P.; Vranješ Markic, Leandra; Zaric, D.; Boronat Medico, Jordi (2017-01-07)
      Article
      Open Access
      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 ...
    • One dimensional H-1, H-2 and H-3 

      Vidal, A.J.; Astrakharchik, Grigori; Vranješ Markic, Leandra; Boronat, J. (2016-05-26)
      Article
      Open Access
      The ground-state properties of one-dimensional electron-spin-polarized hydrogen H-1, deuterium H-2, and tritium 3 Hare obtained by means of quantum Monte Carlo methods. The equations of state of the three isotopes are ...
    • Quantum halo states in helium tetramers 

      Stipanovic, P.; Vranješ Markic, Leandra; Boronat Medico, Jordi (2017-01-12)
      Article
      Open Access
      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 ...
    • Spin-polarized hydrogen adsorbed on the surface of superfluid He-4 

      Marín, J. M.; Vranješ Markic, Leandra; Boronat Medico, Jordi (2013-12-14)
      Article
      Open Access
      The experimental realization of a thin layer of spin-polarized hydrogen H double down arrow adsorbed on top of the surface of superfluid He-4 provides one of the best examples of a stable, nearly two-dimensional(2D) quantum ...
    • Structure of halo and quasi-halo helium–helium–alkali trimers 

      Stipanovic, P.; Vranješ Markic, Leandra; Boronat Medico, Jordi (2017-05-01)
      Article
      Open Access
      We report a diffusion Monte Carlo study of A4He2 and A4He3He trimers’ structural properties, were A is one of the alkali atoms 6,7Li, 23Na, 39K, 85Rb or 133Cs. Some of them are in a pure halo state, characterized by large ...
    • Towards a quantum Monte Carlo-based density functional including finite-range effects: excitation modes of a K 39 quantum droplet 

      Cikojevic, Viktor; Vranješ Markic, Leandra; Pi Pericay, Martí; Barranco Gómez, Manuel; Boronat Medico, Jordi (American Physical Society, 2020-09-25)
      Article
      Open Access
      Some discrepancies between experimental results on quantum droplets made of a mixture of 39K atoms in different hyperfine states and their analysis within extended Gross-Pitaevskii theory (which incorporates beyond mean-field ...
    • Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approach 

      Dželalija, K.; Cikojevic, V.; Boronat Medico, Jordi; Vranješ Markic, Leandra (American Physical Society, 2020-12-04)
      Article
      Open Access
      We study thermal properties of a trapped Bose-Bose mixture in a dilute regime using quantum Monte Carlo methods. Our main aim is to investigate the dependence of the superfluid density and the condensate fraction on ...
    • Two-dimensional Spin-polarized hydrogen at zero temperature 

      Vranješ Markic, Leandra; Boronat Medico, Jordi (2013-06)
      Article
      Open Access
      The ground-state properties of spin polarized hydrogen H↓ in two dimensions (2D) are obtained by means of diffusion Monte Carlo calculations. Using the most accurate to date ab initio H↓–H↓ interatomic potential we have ...
    • Ultradilute quantum liquid drops 

      Cikojevic, V.; Dželalija, K.; Stipanovic, P.; Vranješ Markic, Leandra; Boronat Medico, Jordi (American Physical Society, 2018-04-05)
      Article
      Open Access
      Using quantum Monte Carlo methods we have studied dilute Bose-Bose mixtures with attractive interspecies interaction in the limit of zero temperature. The calculations are exact within some statistical noise and thus go ...
    • Universality in ultradilute liquid Bose-Bose mixtures 

      Cikojevic, V.; Vranješ Markic, Leandra; Astrakharchik, Grigori; Boronat Medico, Jordi (American Physical Society (APS), 2019-02-13)
      Article
      Open Access
      We have studied dilute Bose-Bose mixtures of atoms with attractive interspecies and repulsive intraspecies interactions using quantum Monte Carlo methods at T=0. Using a number of models for interactions, we determine the ...
    • Universality of size-energy ratio in four-body systems 

      Stipanovic, P.; Vranješ Markic, Leandra; Gudyma, Andrii; Boronat Medico, Jordi (Nature, 2019-04-18)
      Article
      Open Access
      Universal relationship of scaled size and scaled energy, which was previously established for two- and three-body systems in their ground state, is examined for four-body systems, using Quantum Monte Carlo simulations. We ...