Report
Observation of a 2D Bose-gas: from thermal to quasi-condensate to superfluid
| العنوان: | Observation of a 2D Bose-gas: from thermal to quasi-condensate to superfluid |
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| المؤلفون: | Cladé, P., Ryu, C., Ramanathan, A., Helmerson, K., Phillips, W. D. |
| سنة النشر: | 2008 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Other Condensed Matter |
| الوصف: | We present experimental results on a Bose gas in a quasi-2D geometry near the Berezinskii, Kosterlitz and Thouless (BKT) transition temperature. By measuring the density profile, \textit{in situ} and after time of flight, and the coherence length, we identify different states of the gas. In particular, we observe that the gas develops a bimodal distribution without long range order. In this state, the gas presents a longer coherence length than the thermal cloud; it is quasi-condensed but is not superfluid. Experimental evidence indicates that we observe the superfluid transition (BKT transition). Comment: 5 pages, 6 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.102.170401 |
| URL الوصول: | http://arxiv.org/abs/0805.3519 |
| رقم الانضمام: | edsarx.0805.3519 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.102.170401 |
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