Browsing by Author "Mazzanti Castrillejo, Fernando Pablo"
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BerezinskiiKosterlitzThouless transition in twodimensional dipolar stripes
Bombín Escudero, Raul; Mazzanti Castrillejo, Fernando Pablo; Boronat Medico, Jordi (American Physical Society (APS), 20191205)
Article
Open AccessA twodimensional quantum system of dipoles, with a polarization angle not perpendicular to the plane, shows a transition from a gas to a stripe phase. We have studied the thermal properties of these two phases using the ... 
Diffusion Monte Carlo methods for spinorbitcoupled ultracold Bose gases
Sánchez Baena, Juan; Boronat Medico, Jordi; Mazzanti Castrillejo, Fernando Pablo (American Physical Society (APS), 20181127)
Article
Open AccessWe present two diffusion Monte Carlo (DMC) algorithms for systems of ultracold quantum gases featuring synthetic spinorbit interactions. The first one is a spinintegrated DMC method which provides fixedphase energy ... 
Dilute dipolar quantum droplets beyond the extended GrossPitaevskii equation
Bötcher, Fabian; Wenzel, Matthias; Schmidt, JanNiklas; Guo, Mingyang; Langen, Tim; FerrierBarbut, Igor; Pfau, Tilman; Bombín Escudero, Raul; Sánchez Baena, Juan; Boronat Medico, Jordi; Mazzanti Castrillejo, Fernando Pablo (American Physical Society, 20191108)
Article
Open AccessDipolar quantum droplets are exotic quantum objects that are selfbound due to the subtle balance of attraction, repulsion, and quantum correlations. Here we present a systematic study of the critical atom number of these ... 
Dipolar Bose Supersolid Stripes
Bombín Escudero, Raul; Boronat Medico, Jordi; Mazzanti Castrillejo, Fernando Pablo (20171220)
Article
Open AccessWe study the superfluid properties of a system of fully polarized dipolar bosons moving in the XY plane. We focus on the general case where the polarization field forms an arbitrary angle a with respect to the Z axis, ... 
Droplets of trapped quantum dipolar bosons
Macia Rey, Adrián; Sánchez Baena, Juan; Boronat Medico, Jordi; Mazzanti Castrillejo, Fernando Pablo (20161110)
Article
Open AccessStrongly interacting systems of dipolar bosons in three dimensions confined by harmonic traps are analyzed using the exact path integral groundstate Monte Carlo method. By adding a repulsive twobody potential, we find a ... 
Ferromagnetic transition of a twocomponent Fermi gas of hard spheres
Arias de Saavedra, F.; Mazzanti Castrillejo, Fernando Pablo; Boronat Medico, Jordi; Polls, A. (20120312)
Article
Open AccessWe use microscopic manybody theory to analyze the problem of itinerant ferromagnetism in a repulsive atomic Fermi gas of hard spheres. Using simple arguments we show that the available theoretical predictions for the onset ... 
Few trapped quantum dipoles: quantum versus classical structures
Sánchez Baena, Juan; Mazzanti Castrillejo, Fernando Pablo; Boronat Medico, Jordi (20180131)
Article
Open AccessWe analyze the ground state of a twodimensional quantum system of a few strongly confined dipolar bosons. Dipoles arrange in different stable structures that depend on the tilting polarization angle and the anisotropy of ... 
Gapped spectrum in pairsuperfluid bosons
Astrakharchik, Grigori; Zillich, Robert E.; Mazzanti Castrillejo, Fernando Pablo; Boronat Medico, Jordi (20161222)
Article
Open AccessWe 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 ... 
Groundstate properties of a dilute homogeneous Bose gas of hard disks in two dimensions
Mazzanti Castrillejo, Fernando Pablo; Polls Martí, Artur; Fabrocini, A (20050310)
Article
Open AccessThe energy and structure of a dilute harddisks Bose gas are studied in the framework of a variational manybody approach based on a Jastrow correlated groundstate wave function. The asymptotic behaviors of the radial ... 
Highorder time expansion path integral ground state
Rota, Riccardo; Casulleras Ambrós, Joaquín; Mazzanti Castrillejo, Fernando Pablo; Boronat Medico, Jordi (201001)
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Open AccessThe feasibility of path integral Monte Carlo ground state calculations with very few beads using a highorder shorttime Green’s function expansion is discussed. An explicit expression of the evolution operator which provides ... 
Largeq neutron inclusivescattering data from liquid 4He
Mazzanti Castrillejo, Fernando Pablo; Polls Martí, Artur (American Physical Society (APS), 19980301)
Article
Open AccessWe report dynamical calculations for largeq structure functions of liquid 4He at T=1.6 and 2.3 K and compare those with recent MARI data. We extend those calculations far beyond the experimental range q<~29 Å1 in order ... 
Lowdimensional weakly interacting Bose gases: nonuniversal equations of state
Astrakharchik, Grigori; Boronat Medico, Jordi; Kurbakov, I L; Lozovik, Y E; Mazzanti Castrillejo, Fernando Pablo (201001)
Article
Open AccessThe zerotemperature equation of state is analyzed in lowdimensional bosonic systems. We propose to use the concept of energydependent swave scattering length for obtaining estimations of nonuniversal terms in the energy ... 
Microscopic approach to the response of 3  4 He mixtures
Fabrocini, A; Mazzanti Castrillejo, Fernando Pablo; Polls Martí, Artur (American Physical Society (APS), 19961001)
Article
Open AccessCorrelatedbasisfunction perturbation theory is used to evaluate the zerotemperature response S(q,¿) of 34He mixtures for inelastic neutron scattering, at momentum transfers q ranging from 1.1 to 1.8 A°1. We adopt a ... 
Microscopic description of anisotropic lowdensity dipolar Bose gases in two dimensions
Macia Rey, Adrián; Mazzanti Castrillejo, Fernando Pablo; Boronat Medico, Jordi; Zillich, R.E. (20110919)
Article
Open AccessA microscopic description of the zeroenergy twobody ground state and manybody static properties of anisotropic homogeneous gases of bosonic dipoles in two dimensions at low densities is presented and discussed. By ... 
Neighborhoodbased stopping criterion for contrastive divergence
Romero Merino, Enrique; Mazzanti Castrillejo, Fernando Pablo; Delgado Pin, Jordi (201807)
Article
Open AccessRestricted Boltzmann Machines (RBMs) are general unsupervised learning devices to ascertain generative models of data distributions. RBMs are often trained using the Contrastive Divergence (CD) learning algorithm, an ... 
Nucleation of helium in liquid lithium at 843 K and high pressures
Martí Rabassa, Jordi; Mazzanti Castrillejo, Fernando Pablo; Astrakharchik, Grigori; Batet Miracle, Lluís; PortosAmill, Laura; Pedreño, Borja (Multidisciplinary Digital Publishing Institute (MDPI), 20220413)
Article
Open AccessFusion energy stands out as a promising alternative for a future decarbonised energy system. In order to be sustainable, future fusion nuclear reactors will have to produce their own tritium. In the socalled breeding ... 
Nucleation of helium in pure liquid lithium
Álvarez Galera, Edgar; Martí Rabassa, Jordi; Mazzanti Castrillejo, Fernando Pablo; Batet Miracle, Lluís (American Institute of Physics (AIP), 20230714)
Article
Open AccessTritium selfsufficiency in fusion nuclear reactors will be based on the neutron capture by lithium in the socalled breeding blankets of the reactor, a nuclear reaction that will produce helium along with tritium. The low ... 
Offdiagonal longrange order in arrays of dipolar droplets
Bombín Escudero, Raul; Mazzanti Castrillejo, Fernando Pablo; Boronat Medico, Jordi (Institute of Physics (IOP), 20240101)
Article
Open AccessWe report quantum Monte Carlo results of harmonically confined quantum Bose dipoles within a range of interactions covering the evolution from a gas phase to the formation of an array of droplets. Scaling the experimental ... 
Onedimensional Bose gas in optical lattices of arbitrary strength
Astrakharchik, Grigori; Krutitsky, K.V.; Lewenstein, Maciej; Mazzanti Castrillejo, Fernando Pablo (20160208)
Article
Open AccessOnedimensional Bose gas with contact interaction in optical lattices at zero temperature is investigated by means of the exact diffusion Monte Carlo algorithm. The results obtained from the fundamental continuous model ... 
Onedimensional harmonically confined SU(N) fermions
Gordillo Bargueño, Maria Carmen; Mazzanti Castrillejo, Fernando Pablo; Boronat Medico, Jordi (American Physical Society (APS), 20190805)
Article
Open AccessWe study the momentum distributions and spatial correlations of few harmonically confined SU(N) fermions using quantum Monte Carlo methods. In our study, we vary the spin degeneracy N from 2 to 6 and the total number of ...