Sequential weak measurements on a quantum harmonic oscillator enable simultaneous quadrature estimation, with backaction increasing information for some strengths and post-processing extending dynamic range while improving decoherence robustness.
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quant-ph 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
Derives upper bounds on pointwise mutual information in terms of stochastic Fisher information that recover known averaged bounds.
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Sequential Measurements as a Resource for Quantum Metrology
Sequential weak measurements on a quantum harmonic oscillator enable simultaneous quadrature estimation, with backaction increasing information for some strengths and post-processing extending dynamic range while improving decoherence robustness.
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Pointwise mutual information bounded by stochastic Fisher information
Derives upper bounds on pointwise mutual information in terms of stochastic Fisher information that recover known averaged bounds.