Quantum limit of optical magnetometry in the presence of ac Stark shifts
Quantum limit of optical magnetometry in the presence of ac Stark shifts
We analyze systematic (classical) and fundamental (quantum) limitations of the sensitivity of optical magnetometers resulting from ac Stark shifts. We show that in contrast to absorption-based techniques, the signal reduction associated with classical broadening can be compensated in magnetometers based on phase measurements using electromagnetically induced transparency (EIT). However due …