Combining causal, retrodictive, and smoothed trajectories reconstructs the full conditional covariance of a continuously measured mechanical oscillator, removing the forward-backward symmetry bias that afflicts the conventional two-trajectory estimator.
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Gravity-induced entanglement in pulsed optomechanics has an input-state-independent threshold g_G > 2 γ_m N_th set by gravitational coupling versus thermal decoherence, with amplification via nonclassical states.
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Unbiased Estimation of Conditional Covariance for Quantum Optomechanics
Combining causal, retrodictive, and smoothed trajectories reconstructs the full conditional covariance of a continuously measured mechanical oscillator, removing the forward-backward symmetry bias that afflicts the conventional two-trajectory estimator.
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Amplification and generation bounds of gravity-induced entanglement in pulsed optomechanical systems
Gravity-induced entanglement in pulsed optomechanics has an input-state-independent threshold g_G > 2 γ_m N_th set by gravitational coupling versus thermal decoherence, with amplification via nonclassical states.