摇晶格干涉实验演示。

Experimental Demonstration of Shaken-Lattice Interferometry.

机构信息

Department of Physics and JILA, University of Colorado, Boulder, Colorado 80309-0440, USA.

出版信息

Phys Rev Lett. 2018 Jun 29;120(26):263201. doi: 10.1103/PhysRevLett.120.263201.

DOI:10.1103/PhysRevLett.120.263201

Abstract

We experimentally demonstrate a shaken-lattice interferometer. Atoms are trapped in the ground Bloch state of a red-detuned optical lattice. Using a closed-loop optimization protocol based on the dcrab algorithm, we phase-modulate (shake) the lattice to transform the atom momentum state. In this way, we implement an atom beam splitter and build five interferometers of varying interrogation times T_{I}. The sensitivity of shaken-lattice interferometry is shown to scale as T_{I}^{2}, consistent with simulation (2C. A. Weidner, H. Yu, R. Kosloff, and D. Z. Anderson, Phys. Rev. A 95, 043624 (2017).PLRAAN2469-992610.1103/PhysRevA.95.043624). Finally, we show that we can measure the sign of an applied signal and optimize the interferometer in the presence of a bias signal.

摘要

我们实验演示了一个受晶格晃动影响的干涉仪。原子被困在一个过红失谐的光晶格的基态布洛赫态中。使用基于 dcrab 算法的闭环优化协议，我们对晶格进行相位调制（晃动），以改变原子动量状态。通过这种方式，我们实现了一个原子分束器，并构建了五个具有不同询问时间 T_{I}的干涉仪。实验结果表明，受晶格晃动影响的干涉仪的灵敏度与 T_{I}^{2}成正比，这与模拟结果一致（2C. A. Weidner、H. Yu、R. Kosloff 和 D. Z. Anderson，Phys. Rev. A 95, 043624 (2017).PLRAAN2469-992610.1103/PhysRevA.95.043624）。最后，我们证明了我们可以测量外加信号的符号，并在存在偏置信号的情况下优化干涉仪。