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Ramsey spectroscopy with squeezed light

Traditional Ramsey spectroscopy has the frequency resolution $2π/T$, where $T$ is the time separation between two light fields. Using squeezed states and two-atom excitation joint detection, we present a new scheme achieving a higher resolution $π/T$. We use two mode squeezed light which exhibits strong entanglement.

preprint2013arXivOpen access

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