Physics – Condensed Matter – Quantum Gases
Scientific paper
2011-06-23
Phys. Rev. A 84 (2011) 013618
Physics
Condensed Matter
Quantum Gases
12 pages, 13 figures
Scientific paper
10.1103/PhysRevA.84.013618
In a recent experiment, a Bose-Einstein condensate of Li7 has been excited by a harmonic modulation of the atomic s-wave scattering length via Feshbach resonance. By combining an analytical perturbative approach with extensive numerical simulations we analyze the emerging nonlinear dynamics of the system on the mean-field Gross-Pitaevskii level at zero temperature. Resulting excitation spectra are presented and prominent nonlinear features are found: mode coupling, higher harmonics generation and significant shifts in the frequencies of collective modes. We indicate how nonlinear dynamical properties could be made clearly observable in future experiments and compared to our results.
Al-Jibbouri Hamid
Balaz Antun
Pelster Axel
Vidanović Ivana
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