Floquet engineering Hz-Level Rabi Spectra in Shallow Optical Lattice Clock

Abstract

Quantum metrology with ultra-high precision usually requires atoms prepared in an ultra-stable environment with well-defined quantum states. Thus, in optical lattice clock systems deep lattice potentials are used to trap ultra-cold atoms. However, decoherence, induced by Raman scattering and higher order light shifts, can significantly be reduced if atomic clocks are realized in shallow optical lattices. On the other hand, in such lattices, tunneling among different sites can cause additional dephasing and strongly broadening of the Rabi spectrum. Here, in our experiment, we periodically drive a shallow ${}^{87}$Sr optical lattice clock. Counter intuitively, shaking the system can deform the wide broad spectral line into a sharp peak with 5.4Hz line-width. With careful comparison between the theory and experiment, we demonstrate that the Rabi frequency and the Bloch bands can be tuned, simultaneously and independently. Our work not only provides a different idea for quantum metrology, such as building shallow optical lattice clock in outer space, but also paves the way for quantum simulation of new phases of matter by engineering exotic spin orbit couplings.

6 pages, 5 figures, comments are welcome and more information at http://cqutp.org/users/xfzhang/

References in corpus (4)

• Dynamical control of matter-wave tunneling in periodic potentials
• Tools for quantum simulation with ultracold atoms in optical lattices
• Quantum State Engineering and Precision Metrology using State-Insensitive Light Traps
• Spin-orbit coupled fermions in an optical lattice clock

Cited by in corpus (5)

• Absolute frequency measurement of the 87Sr optical lattice clock at NTSC using International Atomic Time
• Multipassage Landau-Zener tunneling oscillations in transverse/longitudinal dual dressing of atomic qubits
• Degenerate Rabi spectroscopy of the Floquet engineered optical lattice clock
• Low-frequency fiber-optic vibration sensing with a Floquet-engineered optical lattice clock
• Non-Hermitian Floquet dynamics in absorption spectroscopy