Resonant wavepackets and shock waves in an atomtronic SQUID
The fundamental dynamics of ultracold atomtronic devices are reflected in their phonon modes of excitation. We probe such a spectrum by applying a harmonically driven potential barrier to a 23Na Bose-Einstein condensate in a ring-shaped trap. This perturbation excites phonon wavepackets. When excite...
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| Hauptverfasser: | , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
17 December 2015
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| In: |
New journal of physics
Year: 2015, Jahrgang: 17, Heft: 12 |
| ISSN: | 1367-2630 |
| DOI: | 10.1088/1367-2630/17/12/125012 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1088/1367-2630/17/12/125012
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| Verfasserangaben: | Yi-Hsieh Wang, A. Kumar, F. Jendrzejewski, Ryan M. Wilson, Mark Edwards, S. Eckel, G.K. Campbell and Charles W. Clark |
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| 245 | 1 | 0 | |a Resonant wavepackets and shock waves in an atomtronic SQUID |c Yi-Hsieh Wang, A. Kumar, F. Jendrzejewski, Ryan M. Wilson, Mark Edwards, S. Eckel, G.K. Campbell and Charles W. Clark |
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| 520 | |a The fundamental dynamics of ultracold atomtronic devices are reflected in their phonon modes of excitation. We probe such a spectrum by applying a harmonically driven potential barrier to a 23Na Bose-Einstein condensate in a ring-shaped trap. This perturbation excites phonon wavepackets. When excited resonantly, these wavepackets display a regular periodic structure. The resonant frequencies depend upon the particular configuration of the barrier, but are commensurate with the orbital frequency of a Bogoliubov sound wave traveling around the ring. Energy transfer to the condensate over many cycles of the periodic wavepacket motion causes enhanced atom loss from the trap at resonant frequencies. Solutions of the time-dependent Gross-Pitaevskii equation exhibit quantitative agreement with the experimental data. We also observe the generation of supersonic shock waves under conditions of strong excitation, and collisions of two shock wavepackets. | ||
| 700 | 1 | |a Kumar, A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Jendrzejewski, Fred |e VerfasserIn |0 (DE-588)1140125591 |0 (DE-627)898241529 |0 (DE-576)493655913 |4 aut | |
| 700 | 1 | |a Wilson, Ryan M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Edwards, Mark |e VerfasserIn |4 aut | |
| 700 | 1 | |a Eckel, S. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Campbell, G. K. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Clark, Charles W. |e VerfasserIn |4 aut | |
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