173 citations · 2.1k across the 64 of their papers we have counts for
12 papers · 1 filter
From few to many bosons inside the unitary window: a transition between universal to non-universal behavior
A. Kievsky, A. Polls, B. Juliá-Díaz +2
Universal behaviour in few-bosons systems close to the unitary limit, where two bosons become unbound, has been intensively investigated in recent years both experimentally and the…
Dark-dark-soliton dynamics in two density-coupled Bose-Einstein condensates
I. Morera, A. Muñoz Mateo, A. Polls +1
We study the 1D dynamics of dark-dark solitons in the miscible regime of two density-coupled Bose-Einstein condensates having repulsive interparticle interactions within each conde…
Robustness of discrete semifluxons in closed Bose-Hubbard chains
A. Gallemí, M. Guilleumas, J. Martorell +3
We present the properties of the ground state and low-energy excitations of Bose-Hubbard chains with a geometry that varies from open to closed and with a tunable twisted link. In…
Mesoscopic superpositions of Tonks-Girardeau states and the Bose-Fermi mapping
M. A. García-March, A. V. Yuste-Roca, B. Juliá-Díaz +1
We study a one dimensional gas of repulsively interacting ultracold bosons trapped in a double-well potential as the atom-atom interactions are tuned from zero to infinity. We conc…
Distinguishability, degeneracy and correlations in three harmonically trapped bosons in one-dimension
M. A. García-March, B. Juliá-Díaz, G. E. Astrakharchik +2
We study a system of two bosons of one species and a third boson of a second species in a one-dimensional parabolic trap at zero temperature. We assume contact repulsive inter- and…
Josephson physics of spin-orbit coupled elongated Bose-Einstein condensates
M. A. Garcia-March, G. Mazzarella, L. Dell'Anna +3
We consider an ultracold bosonic binary mixture confined in a one-dimensional double-well trap. The two bosonic components are assumed to be two hyperfine internal states of the sa…
Shortcut to adiabaticity in internal bosonic Josephson junctions
A. Yuste, B. Juliá-Díaz, E. Torrontegui +3
We extend a recent method to shortcut the adiabatic following to internal bosonic Josephson junctions in which the control parameter is the linear coupling between the modes. The a…
Sharp crossover from composite fermionization to phase separation in mesoscopic mixtures of ultracold bosons
M. A. Garcia-March, B. Julia-Diaz, G. E. Astrakharchik +3
We show that a two-component mixture of a few repulsively interacting ultracold atoms in a one-dimensional trap possesses very different quantum regimes and that the crossover betw…
Fast generation of spin-squeezed states in bosonic Josephson junctions
B. Juliá-Díaz, E. Torrontegui, J. Martorell +2
We describe methods for fast production of highly coherent-spin-squeezed many-body states in bosonic Josephson junctions (BJJs). We start from the known mapping of the two-site Bos…
Ferromagnetic transition of a two-component Fermi gas of Hard Spheres
F. Arias de Saavedra, F. Mazzanti, J. Boronat +1
We use microscopic many-body theory to analyze the problem of itinerant ferromagnetism in a repulsive atomic Fermi gas of Hard Spheres. Using simple arguments, we show that the ava…
Improved variational approach to the two-site Bose-Hubbard model
Marina Melé-Messeguer, Bruno Juliá-Díaz, Artur Polls
An improved variational ansatz is proposed to capture the most striking properties of the ground state of a slightly biased attractive two-site Bose-Hubbard Hamiltonian. Our ansatz…
Weakly linked binary mixtures of F=1 87-Rb Bose-Einstein condensates
M. Mele-Messeguer, B. Julia-Diaz, M. Guilleumas +2
We present a study of binary mixtures of Bose-Einstein condensates confined in a double-well potential within the framework of the mean field Gross-Pitaevskii equation. We reexamin…