A New Approach to Spectroscopy via Dynamical Decoupling in the Dissipative Regime

Efficient control and manipulation of quantum states requires a precise matching of laser frequency to the transition frequency. The laser detuning measurements needed to characterize this matching can be challenging to perform. The challenges are exacerbated in experiments with large detuning inhomogeneities or in a noisy environment. For environments such as these, we present an alternative method to the traditionally used Ramsey spectroscopy method. Contrary to what one might expect, dissipative effects in the system are leveraged to enhance sensitivity to laser detuning and yield a precise measurement with greater robustness to systematic frequency noise than Ramsey spectroscopy. We include experimental data comparing the two methods and highlight the advantages the new method has over Ramsey spectroscopy.