Related papers: Non-integer Floquet Sidebands Spectroscopy

Non-integer Floquet Sidebands Spectroscopy

URL: http://arxiv.org/abs/2401.09933v1
Date: Thu, 18 Jan 2024 12:28:51 GMT
Title: Non-integer Floquet Sidebands Spectroscopy
Authors: Du-Yi Ou-Yang, Yan-Hua Zhou, Ya Zhang, Xiao-Tong Lu, Hong Chang, Tao Wang, and Xue-Feng Zhang
Abstract summary: In the quantum system under periodical modulation, the particle can be excited by absorbing the laser photon with the assistance of integer Floquet photons. Here, we experimentally observe non-integer Floquet sidebands emerging between the integer ones. Our work provides new insight into the spectroscopy of the Floquet system and has potential application in quantum technology.
Score: 25.130530098558296
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: In the quantum system under periodical modulation, the particle can be excited by absorbing the laser photon with the assistance of integer Floquet photons, so that the Floquet sidebands appear. Here, we experimentally observe non-integer Floquet sidebands (NIFBs) emerging between the integer ones while increasing the strength of the probe laser in the optical lattice clock system. Then, we propose the Floquet channel interference hypothesis (FCIH) which surprisingly matches quantitatively well with both experimental and numerical results. With its help, we found both Rabi and Ramsey spectra are very sensitive to the initial phase and exhibit additional two symmetries. More importantly, the height of Ramsey NIFBs is comparable to the integer one at larger $g/\omega_s$ which indicates an exotic phenomenon beyond the perturbative description. Our work provides new insight into the spectroscopy of the Floquet system and has potential application in quantum technology.

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