95 citations · 302 across the 13 of their papers we have counts for
13 papers
Chaotic spin dynamics of elongated spinor condensates
Jose Reyes-Calderón, Albert Gallemí, Carsten Klempt +1
Elongated spin- condensates present a highly non-trivial local magnetization dynamics, due to the interplay between nonlinear and quantum effects stemming from the inhomogeneous…
Rotating a supersolid dipolar gas
S. M. Roccuzzo, A. Gallemí, A. Recati +1
Distintictive features of supersolids show up in their rotational properties. We calculate the moment of inertia of a harmonically trapped dipolar Bose-Einstein condensed gas as a…
Decay of the relative phase domain wall into confined vortex pairs: the case of a coherently coupled bosonic mixture
Albert Gallemí, Lev P. Pitaevskii, Sandro Stringari +1
A domain wall of relative phase in a flattened harmonically-trapped Bose-Einstein condensed mixture of two atomic hyperfine states, subject to a stationary Rabi coupling of intensi…
Magnetic defects in an unbalanced mixture of two Bose-Einstein condensates
A. Gallemí, L. P. Pitaevskii, S. Stringari +1
When the spectrum of magnetic excitations of a quantum mixture is much softer than the density spectrum, the system becomes effectively incompressible and can host magnetic defects…
Interaction-enhanced flow of a polariton persistent current in a ring
A. Gallemí, M. Guilleumas, M. Richard +1
We study the quantum hydrodynamical features of exciton-polaritons flowing circularly in a ring-shaped geometry. We consider a resonant-excitation scheme in which the spinor polari…
Quantum Magnetism with Mesoscopic Bose-Einstein Condensates
A. Gallemí, G. Queraltó, M. Guilleumas +2
Lattice gases in the strongly correlated regime have been proven to simulate quantum magnetic models under certain conditions: the mapping of the double-well system onto the Lipkin…
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…
Multidimensional Josephson vortices in spin-orbit coupled Bose-Einstein condensates: snake instability and decay through vortex dipoles
A. Gallemí, M. Guilleumas, R. Mayol +1
We analyze the dynamics of Josephson vortex states in two-component Bose-Einstein condensates with Rashba-Dresselhaus spin-orbit coupling by using the Gross-Pitaevskii equation. In…
Coherent Quantum Phase Slip in two-component bosonic Atomtronic Circuits
A. Gallemí, A. Muñoz Mateo, R. Mayol +1
Coherent Quantum Phase Slip consists in the coherent transfer of vortices in superfluids. We investigate this phenomenon in two miscible coherently coupled components of a spinor B…
Fragmented condensation in Bose-Hubbard trimers with tunable tunnelling
A. Gallemí, M. Guilleumas, J. Martorell +3
We consider a Bose-Hubbard trimer, i.e. an ultracold Bose gas populating three quantum states. The latter can be either different sites of a triple-well potential or three internal…
Mesoscopic Bose-Einstein condensates as quantum simulators
A. Gallemí, M. Guilleumas, R. Mayol +1
Mesoscopic interacting Bose-Einstein condensates confined in a few traps display phase transitions that cannot be explained with a mean field theory. By describing each trap as an…
The role of anisotropy in dipolar bosons in triple-well potentials
A. Gallemí, M. Guilleumas, R. Mayol +1
Mesoscopic samples of polarized dipolar atoms confined in three spatially separated traps conform an extended Bose-Hubbard Hamiltonian in which different quantum phases appear depe…
Propagation of collective modes in non-overlapping dipolar Bose-Einstein condensates
A. Gallemí, M. Guilleumas, R. Mayol +1
We investigate long-range effects of the dipolar interaction in Bose-Einstein condensates by solving the time-dependent 3D Gross-Pitaevskii equation. We study the propagation of ex…