Rabi Spectroscopy and Sensitivity of a Floquet Engineered Optical Lattice Clock
Year: 2021
Authors: Yin M.-J.; Wang T.; Lu X.-T.; Li T.; Wang Y.-B.; Zhang X.-F.; Li W.-D.; Smerzi A.; Chang H.
Autors Affiliation: Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi?an 710600, China; Department of Physics, and Center of Quantum Materials and Devices, Chongqing University, Chongqing 401331, China; Department of Physics and Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China; QSTAR, INO-CNR, and LENS, Largo Enrico Fermi 2, I-50125 Firenze, Italy; School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract: We periodically modulate the lattice trapping potential of a 87Sr optical clock to Floquet engineer the clock transition. In the context of atomic gases in lattices, Floquet engineering has been used to shape the dispersion and topology of Bloch quasi-energy bands. Differently from these previous works manipulating the external (spatial) quasi-energies, we target the internal atomic degrees of freedom. We shape Floquet spin quasi-energies and measure their resonance profiles with Rabi spectroscopy. We provide the spectroscopic sensitivity of each band by measuring the Fisher information and show that this is not depleted by the Floquet dynamical modulation. The demonstration that the internal degrees of freedom can be selectively engineered by manipulating the external degrees of freedom inaugurates a novel device with potential applications in metrology, sensing and quantum simulations.
Journal/Review: CHINESE PHYSICS LETTERS
Volume: 38 (7) Pages from: 073201-1 to: 073201-16
KeyWords: QUANTUM SIMULATIONS; ENTANGLEMENTDOI: 10.1088/0256-307X/38/7/073201