Collective Resonance of D States in Rubidium Atoms Probed by Optical Two-Dimensional Coherent Spectroscopy
Collective Resonance of D States in Rubidium Atoms Probed by Optical Two-Dimensional Coherent Spectroscopy
复制标题
光学二维相干光谱探测铷原子中D态的集体共振
DOI：
10.1103/physrevlett.128.103601
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发表时间：
2022
影响因子：
8.6
通讯作者：
Li, Hebin
中科院分区：
文献类型：
--
作者：
Liang, Danfu;Zhu, Yifu;Li, Hebin
相互作用粒子的集体共振对多体量子系统及其应用具有重要意义。强相互作用会导致封锁，阻止激发两个或多个附近原子的集体共振。然而，弱相互作用的存在可以激发集体共振，并且已经在第一激发态（状态）的原子中观察到集体共振。在这里，我们报告了除了第一激发态之外还观察到铷原子在更高激发态（态）下的集体共振。集体共振由双量子四脉冲激励序列激发。由此产生的双量子二维 (2D) 光谱显示出隔离良好的峰，这些峰可归因于原子和状态的集体共振。实验性的单量子和双量子二维光谱可以通过基于光学布洛赫方程的微扰解的模拟来再现，确认集体共振是测量光谱的起源。该实验技术为制备和探测高激发态原子的集体共振提供了一种新方法。
Collective resonance of interacting particles has important implications in many-body quantum systems and their applications. Strong interactions can lead to a blockade that prohibits the excitation of a collective resonance of two or more nearby atoms. However, a collective resonance can be excited with the presence of weak interaction and has been observed for atoms in the first excited state (state). Here, we report the observation of collective resonance of rubidium atoms in a higher excited state (state) in addition to the first excited state. The collective resonance is excited by a double-quantum four-pulse excitation sequence. The resulting double-quantum two-dimensional (2D) spectrum displays well-isolated peaks that can be attributed to collective resonances of atoms inandstates. The experimental one-quantum and double-quantum 2D spectra can be reproduced by a simulation based on the perturbative solutions to the optical Bloch equations, confirming collective resonances as the origin of the measured spectra. The experimental technique provides a new approach for preparing and probing collective resonances of atoms in highly excited states.