dorsal/arxiv
View SchemaTrap-induced resonances in controlled collisions of cesium atoms
| Authors | Rene Stock, Ivan H. Deutsch |
|---|---|
| Categories | |
| ArXiv ID | physics/0509211 |
| URL | https://arxiv.org/abs/physics/0509211 |
| DOI | 10.1103/PhysRevA.73.032701 |
| Journal | Physical Review A 73, 032701 (2006) |
Abstract
We consider the feasibility of observing a trap-induced resonance [Stock et al., Phys. Rev. Lett. 91, 183201 (2003)] for the case of two 133Cs atoms, trapped in separated wells of a polarization-gradient optical lattice, and interacting through a multichannel scattering process. Due to the anomalously large scattering length of cesium dimers, a strong coupling can occur between vibrational states of the trap and a weakly bound molecular state that is made resonant by the ac-Stark shift of the lattice. We calculate the energy spectrum of the two-atom system as a function of the distance between two potential wells by connecting the solutions of the Schroedinger equation for the short-range molecular potential to that of the long-range trap in a self-consistent manner. The short-range potential is treated through a multichannel pseudopotential, parametrized by the K matrix, calculated numerically for atoms in free space in a close-coupling approximation. This captures both the bound molecular spectrum as well as the energy-dependent scattering for all partial waves. We establish realistic operating conditions under which the trap-induced resonance could be observed and show that this strong and coherent interaction could be used as a basis for high-fidelity two-qubit quantum logic operations.
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"abstract": "We consider the feasibility of observing a trap-induced resonance [Stock et\nal., Phys. Rev. Lett. 91, 183201 (2003)] for the case of two 133Cs atoms,\ntrapped in separated wells of a polarization-gradient optical lattice, and\ninteracting through a multichannel scattering process. Due to the anomalously\nlarge scattering length of cesium dimers, a strong coupling can occur between\nvibrational states of the trap and a weakly bound molecular state that is made\nresonant by the ac-Stark shift of the lattice. We calculate the energy spectrum\nof the two-atom system as a function of the distance between two potential\nwells by connecting the solutions of the Schroedinger equation for the\nshort-range molecular potential to that of the long-range trap in a\nself-consistent manner. The short-range potential is treated through a\nmultichannel pseudopotential, parametrized by the K matrix, calculated\nnumerically for atoms in free space in a close-coupling approximation. This\ncaptures both the bound molecular spectrum as well as the energy-dependent\nscattering for all partial waves. We establish realistic operating conditions\nunder which the trap-induced resonance could be observed and show that this\nstrong and coherent interaction could be used as a basis for high-fidelity\ntwo-qubit quantum logic operations.",
"arxiv_id": "physics/0509211",
"authors": [
"Rene Stock",
"Ivan H. Deutsch"
],
"categories": [
"physics.atom-ph",
"cond-mat.other",
"quant-ph"
],
"doi": "10.1103/PhysRevA.73.032701",
"journal_ref": "Physical Review A 73, 032701 (2006)",
"title": "Trap-induced resonances in controlled collisions of cesium atoms",
"url": "https://arxiv.org/abs/physics/0509211"
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