Ara es mostren els items 25-38 de 38

    • Reply to "comment on 'Berezinskii-Kosterlitz-Thouless transition in two-dimensional dipolar stripes' " 

      Bombín Escudero, Raul; Mazzanti Castrillejo, Fernando Pablo; Boronat Medico, Jordi (American Physical Society, 2020-10-19)
      Article
      Accés obert
      This is a Reply to the Comment from F. Cinti and M. Boninsegni on our recent work on the Berezinskii-Kosterlitz-Thouless (BKT) phase transition in a two-dimensional dipolar system [Bombín, Mazzanti, and Boronat, Phys. Rev. ...
    • Self-bound Bose mixtures 

      Staudinger, Clemens; Mazzanti Castrillejo, Fernando Pablo; Zillich, Robert E. (American Physical Society (APS), 2018-08-31)
      Article
      Accés obert
      Recent experiments confirmed that fluctuations beyond the mean-field approximation can lead to self-bound liquid droplets of ultradilute binary Bose mixtures. We proceed beyond the beyond-mean-field approximation and study ...
    • Single-particle versus pair superfluidity in a bilayer system of dipolar bosons 

      Macia Rey, Adrián; Astrakharchik, Grigori; Mazzanti Castrillejo, Fernando Pablo; Giorgini, Stefano; Boronat Medico, Jordi (2014-10-21)
      Article
      Accés obert
      We consider the ground state of a bilayer system of dipolar bosons, where dipoles are oriented by an external field in the direction perpendicular to the parallel planes. Quantum Monte Carlo methods are used to calculate ...
    • Stopping criteria in contrastive divergence: Alternatives to the reconstruction error 

      Buchaca Prats, David; Romero Merino, Enrique; Mazzanti Castrillejo, Fernando Pablo; Delgado Pin, Jordi (2014)
      Text en actes de congrés
      Accés obert
      Restricted Boltzmann Machines (RBMs) are general unsupervised learning devices to ascertain generative models of data distributions. RBMs are often trained using the Contrastive Divergence learning algorithm (CD), an ...
    • Striped dilute liquid of dipolar bosons in two dimensions 

      Staudinger, Clemens; Hufnagl, Diana; Mazzanti Castrillejo, Fernando Pablo; Zillich, Robert E. (American Physical Society, 2023-09-01)
      Article
      Accés restringit per política de l'editorial
      We investigate the phases of a Bose-Einstein condensate of dipolar atoms restricted to move in a two-dimensional plane. The dipole moments are all aligned in a direction tilted with respect to the plane normal. As a result ...
    • Supersolid striped droplets in a Raman spin-orbit-coupled system 

      Sánchez Baena, Juan; Boronat Medico, Jordi; Mazzanti Castrillejo, Fernando Pablo (American Physical Society, 2020-11-09)
      Article
      Accés obert
      We analyze the role played by quantum fluctuations on a Raman spin-orbit-coupled system in the stripe phase under attractive interspin interactions. We show that beyond-mean-field effects stabilize the collapse predicted ...
    • Supersolid stripes enhanced by correlations in a Raman spin-orbit-coupled system 

      Sánchez Baena, Juan; Boronat Medico, Jordi; Mazzanti Castrillejo, Fernando Pablo (American Physical Society (APS), 2020-04-01)
      Article
      Accés obert
      A Bose gas under the effect of Raman spin-orbit coupling (SOC) is analyzed using the discrete spin T-moves diffusion Monte Carlo method. Upon computing the energy as well as the static structure factor and the superfluid ...
    • The effective two-particle interaction of cold atoms as derived from bragg scattering 

      Sarjonen, R.; Saarela, M.; Mazzanti Castrillejo, Fernando Pablo (2012-12)
      Article
      Accés obert
      We study the dynamic structure function of ultracold alkali-metal gases for large scattering lengths and momenta where corrections to the mean field approximation become important. We compare our result with the Bragg-scattering ...
    • Time-dependent variational Monte Carlo study of the dynamic response of bosons in an optical lattice 

      Gartner, Mathias; Mazzanti Castrillejo, Fernando Pablo; Zillich, Robert E. (2022-08-18)
      Article
      Accés obert
      We study the dynamics of a one-dimensional Bose gas at unit filling in both shallow and deep optical lattices and obtain the dynamic structure factor S(k,¿) by monitoring the linear response to a weak probe pulse. We ...
    • Two-dimensional mixture of dipolar fermions: Equation of state and magnetic phases 

      Comparin, Tommaso; Bombín Escudero, Raul; Holzmann, Markus; Mazzanti Castrillejo, Fernando Pablo; Boronat Medico, Jordi; Giorgini, Stefano (American Physical Society (APS), 2019-04-08)
      Article
      Accés obert
      We study a two-component mixture of fermionic dipoles in two dimensions at zero temperature, interacting via a purely repulsive 1/r3 potential. This model can be realized with ultracold atoms or molecules when their dipole ...
    • Two-dimensional repulsive Fermi polarons with short- A nd long-range interactions 

      Bombín Escudero, Raul; Comparin, Tommaso; Bertaina, Gianluca; Mazzanti Castrillejo, Fernando Pablo; Giorgini, Stefano; Boronat Medico, Jordi (American Physical Society (APS), 2019-08-09)
      Article
      Accés obert
      We study the repulsive polaron problem in a two-component two-dimensional system of fermionic atoms. We use two different interaction models: a short-range (hard-disk) potential and a dipolar potential. In our approach, ...
    • Universal properties of anisotropic dipolar bosons in two dimensions 

      Sánchez Baena, Juan; Peña Ardila, Luis Aldemar; Astrakharchik, Grigori; Mazzanti Castrillejo, Fernando Pablo (2022-08-25)
      Article
      Accés obert
      The energy of ultra-dilute quantum many-body systems is known to exhibit a universal dependence on the gas parameter x = n a d 0 , with n the density, d the dimensionality of the space ( d = 1 , 2 , 3 ) and a 0 the s -wave ...
    • Weighted contrastive divergence 

      Romero Merino, Enrique; Mazzanti Castrillejo, Fernando Pablo; Delgado Pin, Jordi; Buchaca Prats, David (2019-06)
      Article
      Accés obert
      Learning algorithms for energy based Boltzmann architectures that rely on gradient descent are in general computationally prohibitive, typically due to the exponential number of terms involved in computing the partition ...
    • Zero-temperature phase diagram of Yukawa bosons 

      Osychenko, O.N.; Astrakharchik, Grigori; Mazzanti Castrillejo, Fernando Pablo; Boronat Medico, Jordi (2012)
      Article
      Accés obert
      We study the zero-temperature phase diagram of bosons interacting via screened Coulomb (Yukawa) potential by means of the diffusion Monte Carlo method. The Yukawa potential is used as a model interaction in the neutron ...