Zobrazeno 1 - 10
of 1 020
pro vyhledávání: '"Mayol, R."'
Publikováno v:
Phys. Rev. A 99, 023630 (2019)
We analyze the dynamics of Bose-Einstein condensates loaded in rotating ring lattices made of a few sites, and show how rotation maps the states found in this finite system into those belonging to a static infinite lattice. Ring currents and soliton
Externí odkaz:
http://arxiv.org/abs/1811.05565
Publikováno v:
Phys. Rev. A 98, 043612 (2018)
We report on the existence and stability of multidimensional bound solitonic states in harmonically-trapped scalar Bose-Einstein condensates. Their equilibrium separation, as a measure of the strength of the soliton-soliton or the solitonic vortex-vo
Externí odkaz:
http://arxiv.org/abs/1807.10843
Publikováno v:
Phys. Rev. A 94, 063626 (2016)
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-Meshkov-Glick spin model is a paradigmatic case. A suitable definitio
Externí odkaz:
http://arxiv.org/abs/1609.02352
Publikováno v:
New J. Phys.18, 075005 (2016)
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 the vicinity of the symmetric $\pi-$flux case the system behaves as an
Externí odkaz:
http://arxiv.org/abs/1605.00458
Publikováno v:
Phys. Rev. A 93, 033618 (2016)
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 1D, both in homogeneous and harmonically trapped systems, we report o
Externí odkaz:
http://arxiv.org/abs/1511.08685
Publikováno v:
New J. Phys. 18, 015003 (2016)
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 Bose gas confined in a toroidal trap. After imprinting different vortex
Externí odkaz:
http://arxiv.org/abs/1509.04418
Publikováno v:
Phys. Rev. A 91, 063625 (2015)
We analyze the generation of persistent currents in Bose-Einstein condensates of ultracold gases confined in a ring. This phenomenon has been recently investigated in an experiment [Nature \textbf{506}, 200 (2014)], where hysteresis loops have been o
Externí odkaz:
http://arxiv.org/abs/1503.08302
Publikováno v:
New J. Phys. 17 (2015) 073014
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 states of the atoms. The bosons can tunnel between different states w
Externí odkaz:
http://arxiv.org/abs/1501.03306
Publikováno v:
Phys. Rev. A 94, 063626 (2016)
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 effective site of a Bose-Hubbard model and using the Schwinger represe
Externí odkaz:
http://arxiv.org/abs/1411.6004
Publikováno v:
Phys. Rev. A. 88, 063645 (2013)
Mesoscopic samples of polarized dipolar atoms confined in three spatially separated traps conform an extended Bose-Hubbard Hamiltonian in which different quantum phases appear depending on the competition between tunneling, on-site and long range int
Externí odkaz:
http://arxiv.org/abs/1311.4426