Realization of Landau-Zener Rabi Oscillations on optical lattice clock

TL;DR

This paper reports the first observation of Landau-Zener Rabi oscillations in a cold atom optical lattice clock, demonstrating enhanced control over quantum states and suppression of dephasing effects.

Contribution

It is the first to realize and measure LZRO in a cold atom optical lattice clock, with significantly longer plateau durations and insights into interference effects.

Findings

LZRO observed within 4-6 driving periods.

Plateau duration is 10^4 times longer than previous platforms.

Destructive Landau-Zener interference suppresses dephasing.

Abstract

Manipulating quantum states is at the heart of quantum information processing and quantum metrology. Landau-Zener Rabi oscillation (LZRO), which arises from a quantum two-level system swept repeatedly across the avoided crossing point in the time domain, has been suggested for widespread use in manipulating quantum states. Cold atom is one of the most prominent platforms for quantum computing and precision measurement. However, LZRO has never been observed in cold atoms due to its stringent requirements. By compensating for the linear drift of the clock laser and optimizing experimental parameters, we successfully measured LZRO on the strontium atomic optical clock platform under both fast and slow passage limits within $4$ to $6$ driving periods. Compared to previous results on other platforms, the duration of the plateau is $10^4$ times longer in the optical lattice clock. The experimental data also suggest that destructive Landau-Zener interference can effectively suppress dephasing effects in the optical lattice clock, paving the way for manipulating quantum states against various environmental effects in cold atomic systems.