Ramsey measurements for different values of microwave frequency detuning Delta , from the resonance. The red curves are fit to exp(– {t}/{T}_{2}^{*}{} )sin(2 tauOmega Ramsey - phi ). The diagram above the panel shows the microwave measurement sequence (not drawn to scale), where r is the reference readout, s is the signal readout and t is the pulse delay. All the measurements are measured in the absence of a magnetic field.
