Browsing by Author "Boronat Medico, Jordi"

4He adsorbed outside a single carbon nanotube
Gordillo Bargueño, Maria Carmen; Boronat Medico, Jordi (20121008)
Article
Open AccessThe phase diagrams of 4He adsorbed on the external surfaces of single armchair carbon nanotubes with radii in the range 3.42–10.85 Å are calculated using the diffusion Monte Carlo method. For nanotubes narrower than a ... 
Atomic monolayer deposition on the surface of nanotube mechanical resonators
Tavernarakis, Alexandros; Chaste, Julien; Eichler, Alexander; Ceballo, Gustavo; Gordillo Bargueño, Maria Carmen; Boronat Medico, Jordi; Bachtold, Adrian (20140514)
Article
Open AccessWe study monolayers of noble gas atoms (Xe, Kr, Ar, and Ne) deposited on individual ultraclean suspended nanotubes. For this, we record the resonance frequency of the mechanical motion of the nanotube, since it provides a ... 
Composite boson description of a lowdensity gas of excitons
Golomedov, A. E.; Lozovik, Yu. E.; Astrakharchik, Grigori; Boronat Medico, Jordi (20171013)
Article
Open AccessGroundstate properties of a fermionic Coulomb gas are calculated using the fixednode diffusion Monte Carlo method. The validity of the composite boson description is tested for different densities. We extract 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 ... 
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, ... 
Dislocation structure and mobility in hcp raregas solids: quantum versus classical
Sempere Llagostera, Santiago; Serra Tort, Ana María; Boronat Medico, Jordi; Cazorla Silva, Claudio (Multidisciplinary Digital Publishing Institute (MDPI), 20180201)
Article
Open AccessWe study the structural and mobility properties of edge dislocations in raregas crystals with the hexagonal closepacked (hcp) structure by using classical simulation techniques. Our results are discussed in the light of ... 
Distinguishability, degeneracy, and correlations in three harmonically trapped bosons in one dimension
Garcia March, Miguel Angel; Julia Diaz, Bruno; Astrakharchik, Grigori; Boronat Medico, Jordi; Polls, A. (20141201)
Article
Open AccessWe study a system of two bosons of one species and a third atom of a second species in a onedimensional parabolic trap at zero temperature. We assume contact repulsive inter and intraspecies interactions. By means of an ... 
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 ... 
Dynamic structure factor of liquid He 4 across the normalsuperfluid transition
Ferré Porta, Guillem; Boronat Medico, Jordi (20160308)
Article
Open AccessWe have carried out a microscopic study of the dynamic structure factor of liquid He4 across the normalsuperfluid transition temperature using the path integral Monte Carlo method. The illposed problem of the inverse ... 
Dynamic structure function of a cold Fermi gas at unitarity
Astrakharchik, Grigori; Boronat Medico, Jordi; Krotscheck, Eckhard; Lichtenegger, Thomas (Institute of Physics (IOP), 20140814)
Article
Open AccessWe present a theoretical study of the dynamic structure function of a resonantly interacting twocomponent Fermi gas at zero temperature. Our approach is based on dynamic manybody theory able to describe excitations in ... 
Elastic constants of incommensurate solid 4He from diffusion Monte Carlo simulations
Cazorla Silva, Claudio; Lutsyshyn, Yaroslav; Boronat Medico, Jordi (20130628)
Article
Open AccessWe 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 ... 
Elusive structure of helium trimers
Stipanovic, P.; Vranješ Markic, Leandra; Boronat Medico, Jordi (20160823)
Article
Open AccessOver 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 ... 
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 ... 
Firstprinciples modeling of quantum nuclear effects and atomic interactions in solid He4 at high pressure
Cazorla Silva, Claudio; Boronat Medico, Jordi (20150107)
Article
Open AccessWe present a firstprinciples computational study of solid He4 at T = 0 K and pressures up to similar to 160 GPa. Our computational strategy consists in using van der Waals density functional theory (DFTvdW) to describe ... 
Firstprinciples modeling of threebody interactions in highly compressed solid helium
Cazorla Silva, Claudio; Boronat Medico, Jordi (20151231)
Article
Open AccessWe present a set of threebody interaction models based on the SlaterKirkwood (SK) potential that are suitable for the study of the energy, structural, and elastic properties of solid He4 at high pressure. Our effective ... 
Fluid and registered phases in the second layer of 3He on graphite
Gordillo Bargueño, Maria Carmen; Boronat Medico, Jordi (American Physical Society, 20180529)
Article
Open AccessA quantum Monte Carlo approach, considering all the corrugation effects, was used to calculate the complete phase diagram of the second 3He layer adsorbed on graphite. We found that a firstlayer triangular solid was in ... 
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 ... 
Ground state of small mixed helium and spinpolarized tritium clusters: A quantum Monte Carlo study
Stipanovic, P.; Markic, L. Vranjes; Boronat Medico, Jordi; Kezic, B. (20110207)
Article
Restricted access  publisher's policyWe report results for the groundstate energy and structural properties of small 4He–T↓ clusters consisting of up to four T↓ and eight 4He atoms. These results have been obtained using very wellknown 4He–4He and T↓– T↓ ... 
Groundstate properties of weakly bound heliumalkali trimers
Stipanovic, P.; Vranješ Markic, Leandra; Zaric, D.; Boronat Medico, Jordi (20170107)
Article
Open AccessWeakly 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 ...