Atomic Ramsey interferometry with S- and D-band in a triangular optical lattice.
Atomic Ramsey interferometry with S- and D-band in a triangular optical lattice.
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DOI：
10.1364/oe.474257
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发表时间：
2022-10
期刊：
影响因子：
3.8
通讯作者：
Xiangyu Dong;Cheng-xun Wu;Zhongcheng Yu;Jinyuan Tian;Zhongkai Wang;Xuzong Chen;S. Jin;Xiaoji Zhou
中科院分区：
文献类型：
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作者：
Xiangyu Dong;Cheng-xun Wu;Zhongcheng Yu;Jinyuan Tian;Zhongkai Wang;Xuzong Chen;S. Jin;Xiaoji Zhou
拉姆齐干涉仪在科学和工程中有着广泛的应用。与传统的基于内态的干涉仪相比，外量子态干涉仪在量子模拟和精密测量等方面具有一定的应用优势。在这里，我们首次发展了三角光学晶格的D带和S带的布洛赫态的拉姆齐干涉计量学。在二维耦合晶格中实现这种干涉仪的关键是用捷径方法构造π/2脉冲。我们观察到清晰的拉姆齐条纹，并分析了条纹的退相干机制。此外，我们还设计了S波段和D波段之间的回波π脉冲，显著改善了相干时间。这种量纲耦合晶格中的Ramsey干涉仪在拓扑物理、受挫效应和运动量子比特操纵的量子模拟中具有潜在的应用价值。
Ramsey interferometers have wide applications in science and engineering. Compared with the traditional interferometer based on internal states, the interferometer with external quantum states has advantages in some applications for quantum simulation and precision measurement. Here, we develop a Ramsey interferometry with Bloch states in S- and D-band of a triangular optical lattice for the first time. The key to realizing this interferometer in two-dimensionally coupled lattice is that we use the shortcut method to construct π/2 pulse. We observe clear Ramsey fringes and analyze the decoherence mechanism of fringes. Further, we design an echo π pulse between S- and D-band, which significantly improves the coherence time. This Ramsey interferometer in the dimensionally coupled lattice has potential applications in the quantum simulations of topological physics, frustrated effects, and motional qubits manipulation.