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- W2133323418 abstract "We present a quantum-enhanced atomic clock protocol based on groups of sequentially larger Greenberger-Horne-Zeilinger (GHZ) states, that achieves the best clock stability allowed by quantum theory up to a logarithmic correction. The simultaneous interrogation of the laser phase with such a cascade of GHZ states realizes an incoherent version of the phase estimation algorithm that enables Heisenberg-limited operation while extending the Ramsey interrogation time beyond the laser noise limit. We compare the new protocol with state of the art interrogation schemes, and show that entanglement allow a significant quantum gain in the stability for short averaging time." @default.
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- W2133323418 date "2014-05-15" @default.
- W2133323418 modified "2023-09-29" @default.
- W2133323418 title "Heisenberg-Limited Atom Clocks Based on Entangled Qubits" @default.
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- W2133323418 doi "https://doi.org/10.1103/physrevlett.112.190403" @default.
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