A provable exponential quantum-classical learning separation is established for predicting expectation values of time-evolved quantum states under unknown low-intersection Hamiltonians, assuming BQP ⊄ P/poly.
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Full photon-number-resolving detection in a nonlinear interferometer yields a 2.37 dB unconditional shot-noise violation under realistic losses, delivering 44% better estimation precision than click detection.
Simulated noise budget for the proposed CHRONOS sub-Hz detector projects competitive sensitivity near 2 Hz and multi-second earthquake early-warning lead times within 40 km.
citing papers explorer
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Provable learning separation for predicting time-evolution of quantum many-body systems
A provable exponential quantum-classical learning separation is established for predicting expectation values of time-evolved quantum states under unknown low-intersection Hamiltonians, assuming BQP ⊄ P/poly.
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Improving the loss threshold for quantum advantage in photonic sensors by complete photon counting
Full photon-number-resolving detection in a nonlinear interferometer yields a 2.37 dB unconditional shot-noise violation under realistic losses, delivering 44% better estimation precision than click detection.
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Noise budget of Cryogenic sub-Hz cROss torsion bar detector with quantum NOn-demolition Speed meter (CHRONOS)
Simulated noise budget for the proposed CHRONOS sub-Hz detector projects competitive sensitivity near 2 Hz and multi-second earthquake early-warning lead times within 40 km.