Reports experimental measurement of RF signal frequency at 7e-9 fractional uncertainty using subharmonic excitation in a single Ca ion quantum harmonic oscillator, claimed as most precise with this platform.
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A numerically efficient method is established to determine the quantum Cramer-Rao bound for continuously monitored quantum sensors subject to general environmental noise.
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Nonlinear-enhanced wideband sensing via subharmonic excitation of a quantum harmonic oscillator
Reports experimental measurement of RF signal frequency at 7e-9 fractional uncertainty using subharmonic excitation in a single Ca ion quantum harmonic oscillator, claimed as most precise with this platform.
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Quantum Cramer-Rao Precision Limit of Noisy Continuous Sensing
A numerically efficient method is established to determine the quantum Cramer-Rao bound for continuously monitored quantum sensors subject to general environmental noise.