CANP enhances quantum Fisher information by using noncommutativity between critical state preparation and parameter encoding, demonstrated in the quantum Rabi and Lipkin-Meshkov-Glick models at fixed resources.
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Entangled photon pairs enable quadratic quantum polarimetry by simultaneous interaction with depolarizing media, revealing enhanced sensitivity to polarization scrambling via second-order correlations.
Any temperature-dependent unitary driving on a thermalized quantum probe universally boosts its quantum Fisher information for thermometry above the static equilibrium value via a positive kernel of information currents.
A theoretical framework expresses the electron-photon scattered state via the luminescence spectrum and uses subsystem purity plus an EPR-type criterion to distinguish wave-like, particle-like, and classical regimes of spatial entanglement in coherent cathodoluminescence.
For suitable spatial and temporal correlations in non-Markovian dephasing, entangled probes achieve superior sensitivity scaling with probe number compared to separable states in Ramsey spectroscopy.
A new optimization-based protocol estimates quantum coherence from scarce data with system-size-independent cost and is experimentally demonstrated.
Two quantum Wasserstein distance definitions coincide for qubits with single-operator cost functions, implying the self-distance equals the Wigner-Yanase skew information.
High-order squeezed states can deliver better metrological precision than squeezed vacuum at equal occupations, with the advantage depending on the state family and sensitive to dephasing noise.
citing papers explorer
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Enhanced quantum metrology by criticality-assisted noncommutative preparation
CANP enhances quantum Fisher information by using noncommutativity between critical state preparation and parameter encoding, demonstrated in the quantum Rabi and Lipkin-Meshkov-Glick models at fixed resources.
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Quadratic Quantum Polarimetry with Entangled Photon Pairs
Entangled photon pairs enable quadratic quantum polarimetry by simultaneous interaction with depolarizing media, revealing enhanced sensitivity to polarization scrambling via second-order correlations.
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Shake before use: universal enhancement of quantum thermometry by unitary driving
Any temperature-dependent unitary driving on a thermalized quantum probe universally boosts its quantum Fisher information for thermometry above the static equilibrium value via a positive kernel of information currents.
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Electron-Photon Spatial Entanglement in Coherent Cathodoluminescence
A theoretical framework expresses the electron-photon scattered state via the luminescence spectrum and uses subsystem purity plus an EPR-type criterion to distinguish wave-like, particle-like, and classical regimes of spatial entanglement in coherent cathodoluminescence.
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Entanglement Enhanced Sensing with Qubits affected by non-Markovian Dephasing
For suitable spatial and temporal correlations in non-Markovian dephasing, entangled probes achieve superior sensitivity scaling with probe number compared to separable states in Ramsey spectroscopy.
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Scalable protocol to coherence estimation from scarce data: Theory and experiment
A new optimization-based protocol estimates quantum coherence from scarce data with system-size-independent cost and is experimentally demonstrated.
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Relations between different definitions of the quantum Wasserstein distance for qubits
Two quantum Wasserstein distance definitions coincide for qubits with single-operator cost functions, implying the self-distance equals the Wigner-Yanase skew information.
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Quantum metrological advantage of high-order squeezed states
High-order squeezed states can deliver better metrological precision than squeezed vacuum at equal occupations, with the advantage depending on the state family and sensitive to dephasing noise.