68 citations · 422 across the 14 of their papers we have counts for
13 papers · 1 filter
Persistent currents in coherently coupled Bose-Einstein condensates in a ring trap
Marta Abad
We study the stability of persistent currents in a coherently coupled quasi-2D Bose-Einstein condensate confined in a ring trap at T=0. By numerically solving Gross-Pitaevskii equa…
Counter-flow instability of a quantum mixture of two superfluids
M. Abad, A. Recati, S. Stringari +1
We study the instability of a mixture of two interacting counter-flowing superfluids. For a homogeneous system, we show that superfluid hydrodynamics leads to the existence of a dy…
Instability of the superfluid flow as black-hole lasing effect
S. Finazzi, F. Piazza, M. Abad +2
We show that the instability leading to the decay of the one-dimensional superfluid flow through a penetrable barrier are due to the black-hole lasing effect. This dynamical instab…
Phase-slips and vortex dynamics in Josephson oscillations between Bose-Einstein condensates
Marta Abad, Muntsa Guilleumas, Ricardo Mayol +3
We study the relation between Josephson dynamics and topological excitations in a dilute Bose-Einstein condensate confined in a double-well trap. We show that the phase slips respo…
Magnetic phase transition in coherently coupled Bose gases in optical lattices
L. Barbiero, M. Abad, A. Recati
We describe the ground state of a gas of bosonic atoms with two coherently coupled internal levels in a deep optical lattice in a one dimensional geometry. In the single-band appro…
Persistent currents in two-component condensates in a toroidal trap
M. Abad, A. Sartori, S. Finazzi +1
The stability of persistent currents in a two-component Bose-Einstein condensate in a toroidal trap is studied both in the miscible and immiscible regimes. In the miscible regime w…
A study of coherently coupled two-component Bose-Einstein Condensates
M. Abad, A. Recati
We present a self-consistent study of coherently coupled two-component Bose-Einstein condensates. Finite spin-flipping coupling changes the first order demixing phase transition fo…
Quadrupole oscillation in a dipolar Fermi gas: hydrodynamic vs collisionless regime
Marta Abad, Alessio Recati, Sandro Stringari
The surface quadrupole mode of an harmonically trapped dipolar Fermi gas is studied in both the hydrodynamic and collisionless regimes. The anisotropy and long range effects of the…
Phase-slippage and self-trapping in a self-induced bosonic Josephson junction
M. Abad, M. Guilleumas, R. Mayol +2
A dipolar condensate confined in a toroidal trap constitutes a self-induced Josepshon junction when the dipoles are oriented perpendicularly to the trap symmetry axis and the s-wav…
A dipolar self-induced bosonic Josephson junction
M. Abad, M. Guilleumas, R. Mayol +2
We propose a new scheme for observing Josephson oscillations and macroscopic quantum self-trapping phenomena in a toroidally confined Bose-Einstein condensate: a dipolar self-induc…
Dipolar condensates confined in a toroidal trap: ground state and vortices
M. Abad, M. Guilleumas, R. Mayol +2
We study a Bose-Einstein condensate of 52Cr atoms confined in a toroidal trap with a variable strength of s-wave contact interactions. We analyze the effects of the anisotropic nat…
Energy barriers for vortex nucleation in dipolar condensates
M. Abad, M. Guilleumas, R. Mayol +2
We consider singly-quantized vortex states in a condensate of 52Cr atoms in a pancake trap. We obtain the vortex solutions by numerically solving the Gross-Pitaevskii equation in t…
Vortices in dipolar condensates with dominant dipolar interactions
M. Abad, M. Guilleumas, R. Mayol +2
We present full three-dimensional numerical calculations of single vortex states in rotating dipolar condensates. We consider a Bose-Einstein condensate of 52Cr atoms with dipole-d…