Department of Physics, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel.
Phys Rev Lett. 2013 Jun 28;110(26):265301. doi: 10.1103/PhysRevLett.110.265301. Epub 2013 Jun 25.
By a novel reciprocal space analysis of the measurement, we report a calibrated in situ observation of the bunching effect in a 3D ultracold gas. The calibrated measurement with no free parameters confirms the role of the exchange symmetry and the Hanbury Brown-Twiss effect in the bunching. Also, the enhanced fluctuations of the bunching effect give a quantitative measure of the increased isothermal compressibility. We use 2D images to probe the 3D gas, using the same principle by which computerized tomography reconstructs a 3D image of a body. The powerful reciprocal space technique presented is applicable to systems with one, two, or three dimensions.
通过对测量的新的倒空间分析，我们报告了在 3D 超冷气体中对聚束效应的校准原位观察。没有自由参数的校准测量证实了交换对称性和汉伯里-布朗-图维效应在聚束中的作用。此外，聚束效应增强的涨落给出了等温压缩性增加的定量度量。我们使用二维图像来探测三维气体，使用与计算机断层扫描重建身体三维图像相同的原理。所提出的强大的倒空间技术适用于一维、二维或三维系统。
