Quantitative comparison between theoretical predictions and experimental results for Bragg spectroscopy of a strongly interacting Fermi superfluid
Quantitative comparison between theoretical predictions and experimental results for Bragg spectroscopy of a strongly interacting Fermi superfluid
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强相互作用费米超流体布拉格光谱的理论预测与实验结果之间的定量比较
DOI：
10.1103/physreva.82.061605
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发表时间：
2010-09
影响因子：
2.9
通讯作者：
Zou, Peng
中科院分区：
文献类型：
--
作者：
Hu, Hui;Kuhnle, Eva D.;Vale, Chris J.;Zou, Peng
理论预测的动态结构因子的谐波捕获费米超流体附近的BEC-BCS交叉最近的布拉格光谱测量在大转移动量进行了比较。计算是基于随机相位（或含时Hartree-Fock-Gorkov）近似推广到强相互作用制度。与实验光谱在低温下得到很好的协议，没有自由参数。零温静态结构因子的理论预测也被发现符合良好的实验结果和独立的理论计算的基础上的确切的Tan关系。预测了在么正性下结构因子的温度依赖性。
Theoretical predictions for the dynamic structure factor of a harmonically trapped Fermi superfluid near the BEC-BCS crossover are compared with recent Bragg spectroscopy measurements at large transferred momenta. The calculations are based on a random-phase (or time-dependent Hartree-Fock-Gorkov) approximation generalized to the strongly interacting regime. Excellent agreement with experimental spectra at low temperatures is obtained, with no free parameters. Theoretical predictions for zero-temperature static structure factor are also found to agree well with the experimental results and independent theoretical calculations based on the exact Tan relations. The temperature dependence of the structure factors at unitarity is predicted.