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Trade-offs between unitary and measurement induced spin squeezing in cavity QED
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Trade-offs between unitary and measurement induced spin squeezing in cavity QED
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Paper
Trade-offs between unitary and measurement induced spin squeezing in cavity QED
2024
Overview
We study the combined effects of measurements and unitary evolution on the preparation of spin squeezing in an ensemble of atoms interacting with a single electromagnetic field mode inside a cavity. We derive simple criteria that determine the conditions at which measurement based entanglement generation overperforms unitary protocols. We include all relevant sources of decoherence and study both their effect on the optimal spin squeezing and the overall size of the measurement noise, which limits the dynamical range of quantum-enhanced phase measurements. Our conclusions are relevant for state-of-the-art atomic clocks that aim to operate below the standard quantum limit.
Publisher
Cornell University Library, arXiv.org
