Probing excited-state dynamics with quantum entangled photons: Correspondence to coherent multidimensional spectroscopy
Probing excited-state dynamics with quantum entangled photons: Correspondence to coherent multidimensional spectroscopy
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DOI：
10.1063/5.0015432
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发表时间：
2020-08-07
影响因子：
4.4
通讯作者：
Ishizaki, Akihito
中科院分区：
文献类型：
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作者：
Ishizaki, Akihito
量子光对于推动量子技术是一种关键资源。一类此类技术旨在利用工程化的光量子态提高光学测量的精度。在这项研究中，我们研究了利用单色激光通过参量下转换产生的频率纠缠宽带光子对的透射测量。观察到，当纠缠时间足够短时，通过调节纠缠双光束之间的光程差，可以在时间上分辨所研究系统中的态 - 态动力学。非经典光子关联使得利用单色泵浦进行时间分辨光谱学成为可能。进一步证明，该信号对应于例如二维傅里叶变换光子回波光谱的反对角线上的光谱信息。这种对应关系启发我们预期，更精心设计的光子态将拓宽量子光谱学的应用范围。
Quantum light is a key resource for promoting quantum technology. One such class of technology aims to improve the precision of optical measurements using engineered quantum states of light. In this study, we investigate transmission measurement of frequency-entangled broadband photon pairs generated via parametric down-conversion with a monochromatic laser. It is observed that state-to-state dynamics in the system under study are temporally resolved by adjusting the path difference between the entangled twin beams when the entanglement time is sufficiently short. The non-classical photon correlation enables time-resolved spectroscopy with monochromatic pumping. It is further demonstrated that the signal corresponds to the spectral information along anti-diagonal lines of, for example, two-dimensional Fourier-transformed photon-echo spectra. This correspondence inspires us to anticipate that more elaborately engineered photon states would broaden the availability of quantum light spectroscopy.