Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Javier von Stecher"'
Autor:
Alessandro Zenesini, Bo Huang, Martin Berninger, Stefan Besler, Hanns-Christoph Nägerl, Francesca Ferlaino, Rudolf Grimm, Chris H Greene, Javier von Stecher
Publikováno v:
New Journal of Physics, Vol 15, Iss 4, p 043040 (2013)
We combine theory and experiment to investigate five-body recombination in an ultracold gas of atomic cesium at negative scattering length. A refined theoretical model, in combination with extensive laboratory tunability of the interatomic interactio
Externí odkaz:
https://doaj.org/article/04bd252df5ad48d6a30a87dcf3915689
Publikováno v:
Physical Review A. 91
We study the $2e^-2e^+$ equal-mass charge-neutral four-body system in the adiabatic hyperspherical framework. The lowest few adiabatic potentials are calculated for zero orbital angular momentum, positive parity, and charge conjugation symmetries. Pr
The spectrum of two bosons and two fermions in a trap is calculated using a correlated-Gaussian basis throughout the range of a broad Fano-Feshbach resonance. The calculations provide a few-body solution to the magneto-association of fermionic Feshba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57b62d306cf4e5db30c184e7c82171ed
We study three- and four-body Efimov physics in a heteronuclear atomic system with three identical heavy bosonic atoms and one light atom. We show that exchange of the light atom between the heavy atoms leads to both three- and four-body features in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64dfc2ef8a5bc52c758b4d293a441d00
http://arxiv.org/abs/1109.1581
http://arxiv.org/abs/1109.1581
Autor:
Javier von Stecher
Publikováno v:
Physical review letters. 107(20)
We explore the properties of weakly bound bosonic states in the strongly interacting regime. Combining a correlated-Gaussian basis set expansion with a complex-scaling method, we extract the energies and structural properties of bosonic cluster state
Publikováno v:
Physical review letters. 106(23)
We study the resonant effects produced when a Feshbach dimer crosses a scattering continuum band of atoms in an optical lattice. We numerically obtain the exact spectrum of two particles in a one-dimensional lattice and develop an effective atom-dime
Autor:
Chris H. Greene, Javier von Stecher
Publikováno v:
Physical Review A. 80
We develop an innovative numerical technique to describe few-body systems. Correlated Gaussian basis functions are used to expand the channel functions in the hyperspherical representation. The method is proven to be robust and efficient compared to
Autor:
Javier von Stecher
We study the behavior of weakly bound clusters and their relation to the well-known three-body Efimov states. We adopt a model to describe universal behavior of strongly interacting bosonic systems, and we test its validity by reproducing predictions
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c59be7e06e68fd9398ac7a8481a32ff9
Autor:
Javier von Stecher, Chris H. Greene
Publikováno v:
Physical Review Letters. 99
The spectrum of two spin-up and two spin-down fermions in a trap is calculated using a correlated gaussian basis throughout the range of the BCS-BEC crossover. These accurate calculations provide a few-body solution to the crossover problem. This sol
Publikováno v:
Physical Review A. 75