Defines quenched tail-certified information via inverse upper-tail loss, proves averaged Fisher data cannot certify it, identifies a Fisher-zero integrability transition, and shows tail-certified designs outperform average-QFI optimization by orders of magnitude in NV Ramsey experiments.
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15 Pith papers cite this work. Polarity classification is still indexing.
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A finite-frequency fluctuation-response inequality bounds the measured lock-in response-to-noise matrix by the output-field quantum Fisher information rate for Markovian open quantum systems.
A new scalar for Uhlmann curvature is defined from the Yang-Mills action, proven gauge-invariant and reparametrization-invariant, and linked to incompatibility in quantum multiparameter estimation.
Ultimate precision bounds for multiparameter Markovian noise metrology show average variance scaling as Ω(1/(T R²)) with Heisenberg scaling in dissipative channels R when using entangled probes and high-rank signal correlations, attainable via rapid prepare-and-measure protocols.
Optimal null-constrained source encoding in TRY interferometers is achieved by noise-weighted projection of the derivative response, retaining Fisher information reduced exactly by the factor 1-χ² where χ is the inverse-noise overlap.
Differential source-basis encoding in a time-reversed Young interferometer enables superresolved local parameter estimation with robust gains over raster sampling and parameter-dependent interference improvements.
A proposed chip-scale device combines a transmon qubit, SQUID, and nanomechanical resonator to achieve projected gravitational sensitivity of 100-1000 nGal per square root Hz with sub-millisecond interrogation times.
Derives a projected quantum speed limit via quantum Fisher information on a quotient manifold to profile out calibration nuisance parameters for Markovian dynamics, with explicit application to Jaynes-Cummings sensors.
Derives causal Fisher-information inequalities from classical causal models via a series law on inverse Fisher information, showing violations falsify the model class and certify quantum metrological advantage through forbidden score correlations.
Time-reversed Young interferometry yields deterministic fringes as conditional responses indexed by source coordinates, enabling precise calibration and superresolution via Fisher information analysis.
A quartic extension of the twisting-and-turning Hamiltonian generates new unstable fixed points that accelerate short-time amplification of quantum fluctuations, yielding enhanced sensitivity within accessible coherence times.
The work introduces hybrid receivers for BPSK coherent-state discrimination with quantum advantage and new discrete-modulation CVQKD protocols that incorporate optical amplifiers and state-discrimination receivers for performance gains.
In an N-qubit network with one conserved excitation, a single transition amplitude determines positivity and complete positivity of subsystem propagators, links them to excitation flow and Fisher information, and reveals an unvisited band of states inside the positivity domain.
Clock time is reconstructed from the accumulated Fisher distinguishability along causally ordered physical changes, rather than being a fundamental quantity measured by clocks.
citing papers explorer
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Fisher Glasses: Tail-Certified Quantum Metrology in Quenched Environments
Defines quenched tail-certified information via inverse upper-tail loss, proves averaged Fisher data cannot certify it, identifies a Fisher-zero integrability transition, and shows tail-certified designs outperform average-QFI optimization by orders of magnitude in NV Ramsey experiments.
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Finite-frequency fluctuation-response bounds for open quantum systems
A finite-frequency fluctuation-response inequality bounds the measured lock-in response-to-noise matrix by the output-field quantum Fisher information rate for Markovian open quantum systems.
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Quantifying Uhlmann curvature from Yang-Mills action and its implications in quantum multiparameter estimation
A new scalar for Uhlmann curvature is defined from the Yang-Mills action, proven gauge-invariant and reparametrization-invariant, and linked to incompatibility in quantum multiparameter estimation.
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Precision Limits of Multiparameter Markovian-Noise Metrology
Ultimate precision bounds for multiparameter Markovian noise metrology show average variance scaling as Ω(1/(T R²)) with Heisenberg scaling in dissipative channels R when using entangled probes and high-rank signal correlations, attainable via rapid prepare-and-measure protocols.
-
Optimal Null-Constrained Source-Basis Sensing in a Time-Reversed Young Interferometer
Optimal null-constrained source encoding in TRY interferometers is achieved by noise-weighted projection of the derivative response, retaining Fisher information reduced exactly by the factor 1-χ² where χ is the inverse-noise overlap.
-
Differential source-basis encoding for superresolved parameter estimation in a time-reversed Young interferometer
Differential source-basis encoding in a time-reversed Young interferometer enables superresolved local parameter estimation with robust gains over raster sampling and parameter-dependent interference improvements.
-
Chip-scale superconducting quantum gravimeter combining a SQUID, a transmon, and a nanomechanical resonator
A proposed chip-scale device combines a transmon qubit, SQUID, and nanomechanical resonator to achieve projected gravitational sensitivity of 100-1000 nGal per square root Hz with sub-millisecond interrogation times.
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Quantum Speed Limit under Calibration Uncertainty
Derives a projected quantum speed limit via quantum Fisher information on a quotient manifold to profile out calibration nuisance parameters for Markovian dynamics, with explicit application to Jaynes-Cummings sensors.
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Causal Fisher-Information Inequalities: Classical Causal Model Falsification and Metrological Advantage
Derives causal Fisher-information inequalities from classical causal models via a series law on inverse Fisher information, showing violations falsify the model class and certify quantum metrological advantage through forbidden score correlations.
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From Random Fringes to Deterministic Response: Statistical Foundations of Time-Reversed Young Interferometry
Time-reversed Young interferometry yields deterministic fringes as conditional responses indexed by source coordinates, enabling precise calibration and superresolution via Fisher information analysis.
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Instability-Enhanced Quantum Sensing with Tunable Multibody Interactions
A quartic extension of the twisting-and-turning Hamiltonian generates new unstable fixed points that accelerate short-time amplification of quantum fluctuations, yielding enhanced sensitivity within accessible coherence times.
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Quantum communications in continuous variable systems
The work introduces hybrid receivers for BPSK coherent-state discrimination with quantum advantage and new discrete-modulation CVQKD protocols that incorporate optical amplifiers and state-discrimination receivers for performance gains.
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Excitation Flow, Positivity, and Fisher Information for Open Subsystems of an $N$-Qubit Network
In an N-qubit network with one conserved excitation, a single transition amplitude determines positivity and complete positivity of subsystem propagators, links them to excitation flow and Fisher information, and reveals an unvisited band of states inside the positivity domain.
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Fisher-Informational Time: A Causal-Geometric Framework for Emergent Clock Time Physical Distinguishability
Clock time is reconstructed from the accumulated Fisher distinguishability along causally ordered physical changes, rather than being a fundamental quantity measured by clocks.
- Information-Geometric Quantum Process Tomography in Unital Open Single-Qubit Dynamics