تقرير
Spontaneous breaking of spatial and spin symmetry in spinor condensates
| العنوان: | Spontaneous breaking of spatial and spin symmetry in spinor condensates |
|---|---|
| المؤلفون: | Scherer, M., Lücke, B., Gebreyesus, G., Topic, O., Deuretzbacher, F., Ertmer, W., Santos, L., Arlt, J. J., Klempt, C. |
| المصدر: | Phys. Rev. Lett. 105, 135302 (2010) |
| سنة النشر: | 2010 |
| المجموعة: | Condensed Matter Quantum Physics |
| مصطلحات موضوعية: | Condensed Matter - Quantum Gases, Quantum Physics |
| الوصف: | Parametric amplification of quantum fluctuations constitutes a fundamental mechanism for spontaneous symmetry breaking. In our experiments, a spinor condensate acts as a parametric amplifier of spin modes, resulting in a twofold spontaneous breaking of spatial and spin symmetry in the amplified clouds. Our experiments permit a precise analysis of the amplification in specific spatial Bessel-like modes, allowing for the detailed understanding of the double symmetry breaking. On resonances that create vortex-antivortex superpositions, we show that the cylindrical spatial symmetry is spontaneously broken, but phase squeezing prevents spin-symmetry breaking. If, however, nondegenerate spin modes contribute to the amplification, quantum interferences lead to spin-dependent density profiles and hence spontaneously-formed patterns in the longitudinal magnetization. Comment: 5 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.105.135302 |
| URL الوصول: | http://arxiv.org/abs/1007.2342 |
| رقم الأكسشن: | edsarx.1007.2342 |
| قاعدة البيانات: | arXiv |
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