4 papers
Observation of symmetry-protected selection rules in periodically driven quantum systems
Guoqing Wang, Changhao Li, Paola Cappellaro
Periodically driven quantum systems, known as Floquet systems, have been a focus of non-equilibrium physics in recent years, thanks to their rich dynamics. Not only time-periodic s…
Nanoscale vector AC magnetometry with a single nitrogen-vacancy center in diamond
Guoqing Wang, Yi-Xiang Liu, Yuan Zhu +1
Detection of AC magnetic fields at the nanoscale is critical in applications ranging from fundamental physics to materials science. Isolated quantum spin defects, such as the nitro…
Observation of high-order Mollow triplet by quantum mode control with concatenated continuous driving
Guoqing Wang, Yi-Xiang Liu, Paola Cappellaro
The Mollow triplet is a fundamental signature of quantum optics, and has been observed in numerous quantum systems. Although it arises in the 'strong driving' regime of the quantiz…
Coherence protection and decay mechanism in qubit ensembles under concatenated continuous driving
Guoqing Wang, Yi-Xiang Liu, Paola Cappellaro
Dense ensembles of spin qubits are valuable for quantum applications, even though their coherence protection remains challenging. Continuous dynamical decoupling can protect ensemb…