Abstract
A new line-narrowing effect in coincidence interferometry yielding subnatural resolution of atomic transition frequencies is proposed and analyzed. The approach utilizes second-order photon correlation properties of the radiation field. This is in contrast to the first-order measurements associated with time delay spectroscopy, which is known to yield subnatural resolution. Connections between the two techniques are investigated.
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Dedicated to the memory of Professor Julian Schwinger, a role model for us all
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Rathe, U.W., Scully, M.O. Theoretical basis for a new subnatural spectroscopy via correlation interferometry. Lett Math Phys 34, 297–307 (1995). https://doi.org/10.1007/BF01872783
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DOI: https://doi.org/10.1007/BF01872783