Zobrazeno 1 - 10
of 176
pro vyhledávání: '"Simoni, Andrea"'
Autor:
Simoni, Andrea
We present a numerical procedure allowing one to extract Feshbach resonance parameters from numerical calculations without relying on approximate fitting procedures. Our approach is based on a simple decomposition of the reactance matrix in terms of
Externí odkaz:
http://arxiv.org/abs/2108.04712
Publikováno v:
Phys. Rev. A 100, 012704 (2019)
We study polar alkali dimer scattering in a quasi-1D geometry for both reactive and non-reactive species. Elastic and reactive rates are computed as a function of the amplitude of a static electric field within a purely long-range model with suitable
Externí odkaz:
http://arxiv.org/abs/1901.06164
Autor:
Fouche, Lauriane, Boissé, Amaudric, Berthet, Guillaume, Lepoutre, Steven, Simoni, Andrea, Bourdel, Thomas
Publikováno v:
Phys. Rev. A 99, 022701 (2019)
We study atom losses associated to a previously unreported magnetic Feshbach resonance in potassium 39. This resonance is peculiar in that it presents $d$-wave character both in the open and in the closed channels, directly coupled by the dominant sp
Externí odkaz:
http://arxiv.org/abs/1810.11201
Autor:
Burchianti, Alessia, D'Errico, Chiara, Rosi, Sara, Simoni, Andrea, Modugno, Michele, Fort, Chiara, Minardi, Francesco
Publikováno v:
Phys. Rev. A 98, 063616 (2018)
We report on the production of a 41K-87Rb dual-species Bose-Einstein condensate in a hybrid trap, consisting of a magnetic quadrupole and an optical dipole potential. After loading both atomic species in the trap, we cool down 87Rb first by magnetic
Externí odkaz:
http://arxiv.org/abs/1810.08394
We apply the spectral element method to the determination of scattering and bound states of the multichannel Schr\"odinger equation. In our approach the reaction coordinate is discretized on a grid of points whereas the internal coordinates are descr
Externí odkaz:
http://arxiv.org/abs/1705.04102
We show that a pseudospectral representation of the wavefunction using multiple spatial domains of variable size yields a highly accurate, yet efficient method to solve the time-dependent Schr\"odinger equation. The overall spatial domain is split in
Externí odkaz:
http://arxiv.org/abs/1611.09034
Autor:
Viel, Alexandra, Simoni, Andrea
We study theoretically magnetically induced Feshbach resonances and near-threshold bound states in isotopic NaK pairs. Our calculations accurately reproduce Feshbach spectroscopy data on Na$^{40}$K and explain the origin of the observed multiplets in
Externí odkaz:
http://arxiv.org/abs/1604.00234
Publikováno v:
Phys. Rev. A 93, 032703 (2016)
We study theoretically ultracold collisions in quasi one-dimensional optical traps for bosonic and fermionic reactive molecules in the presence of a periodic potential along the trap axis. Elastic, reactive, and umklapp processes due to non-conservat
Externí odkaz:
http://arxiv.org/abs/1604.00238
Autor:
Simoni, Andrea, Srinivasan, Srihari, Launay, Jean-Michel, Jachymski, Krzysztof, Idziaszek, Zbigniew, Julienne, Paul S.
Publikováno v:
New J. Phys. 17, 013020 (2015)
We study polar molecule scattering in quasi-one-dimensional geometries. Elastic and reactive collision rates are computed as a function of collision energy and electric dipole moment for different confinement strengths. The numerical results are inte
Externí odkaz:
http://arxiv.org/abs/1409.5556
Autor:
Roy, Sanjukta, Landini, Manuele, Trenkwalder, Andreas, Semeghini, Giulia, Spagnolli, Giacomo, Simoni, Andrea, Fattori, Marco, Inguscio, Massimo, Modugno, Giovanni
Publikováno v:
Phys. Rev. Lett. 111, 053202 (2013)
We measure the critical scattering length for the appearance of the first three-body bound state, or Efimov three-body parameter, at seven different Feshbach resonances in ultracold 39K atoms. We study both intermediate and narrow resonances, where t
Externí odkaz:
http://arxiv.org/abs/1303.3843