تقرير
Optically detecting the quantization of collective atomic motion
| العنوان: | Optically detecting the quantization of collective atomic motion |
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| المؤلفون: | Brahms, Nathan, Botter, Thierry, Schreppler, Sydney, Brooks, Daniel W. C., Stamper-Kurn, Dan M. |
| سنة النشر: | 2011 |
| المجموعة: | Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Physics - Atomic Physics, Physics - Optics |
| الوصف: | We directly measure the quantized collective motion of a gas of thousands of ultracold atoms, coupled to light in a high-finesse optical cavity. We detect strong asymmetries, as high as 3:1, in the intensity of light scattered into low- and high-energy motional sidebands. Owing to high cavity-atom cooperativity, the optical output of the cavity contains a spectroscopic record of the energy exchanged between light and motion, directly quantifying the heat deposited by a quantum position measurement's backaction. Such backaction selectively causes the phonon occupation of the observed collective modes to increase with the measurement rate. These results, in addition to providing a method for calibrating the motion of low-occupation mechanical systems, offer new possibilities for investigating collective modes of degenerate gases and for diagnosing optomechanical measurement backaction. Comment: 4 pages plus supplemental material |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.108.133601 |
| URL الوصول: | http://arxiv.org/abs/1109.5233 |
| رقم الأكسشن: | edsarx.1109.5233 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.108.133601 |
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