Continuous-Variable Nonclassicality Detection under Coarse-Grained Measurement
arXiv:2212.14343 · doi:10.1103/PhysRevResearch.5.043057
Abstract
Coarse graining is a common imperfection of realistic quantum measurement, obstructing the direct observation of quantum features. Under highly coarse-grained measurement, we experimentally detect the continuous-variable nonclassicality of both Gaussian and non-Gaussian states. Remarkably, we find that this coarse-grained measurement outperforms the conventional fine-grained measurement for nonclassicality detection: it detects nonclassicality beyond the reach of the variance criterion, and furthermore, it exhibits stronger statistical significance than the high-order moments method. Our work shows the usefulness of coarse-grained measurement by providing a reliable and efficient way of nonclassicality detection for quantum technologies.
References in corpus (36)
- Encoding a qubit in an oscillator
- Continuous-variable optical quantum state tomography
- Detection of 15 dB Squeezed States of Light and their Application for the Absolute Calibration of Photoelectric Quantum Efficiency
- Multipartite entanglement for continuous variables: A quantum teleportation network
- Entanglement by a beam splitter: nonclassicality as a prerequisite for entanglement
- Time-Domain Multiplexed 2-Dimensional Cluster State: Universal Quantum Computing Platform
- Long-Distance Continuous-Variable Quantum Key Distribution over 202.81 km of Fiber
- 30 years of squeezed light generation
- Phase-Programmable Gaussian Boson Sampling Using Stimulated Squeezed Light
- Deterministic generation of a two-dimensional cluster state
- Distributed quantum sensing in a continuous variable entangled network
- A computable measure of nonclassicality for light
- Iterative maximum-likelihood reconstruction in quantum homodyne tomography
- Continuous variable quantum key distribution with two-mode squeezed states
- Classical world arising out of quantum physics under the restriction of coarse-grained measurements
- Non-Gaussian quantum states of a multimode light field
- Nonclassical Moments and their Measurement
- Continuous-variable quantum computing in the quantum optical frequency comb
- Detecting quantum non-Gaussianity via the Wigner function
- Preparation of distilled and purified continuous variable entangled states
- Violation of Continuous Variable EPR Steering with Discrete Measurements
- Optimal Gaussian measurements for phase estimation in single-mode Gaussian metrology
- Coarse Graining Makes It Hard to See Micro-Macro Entanglement
- Quantum non-Gaussianity witnesses in the phase space
- Squeezing-enhanced quantum key distribution over atmospheric channels
- Real-Time Source Independent Quantum Random Number Generator with Squeezed States
- Deterministic quantum phase estimation beyond the ideal NOON state limit
- Reliable Entanglement Detection Under Coarse--Grained Measurements
- Quantum non-Gaussianity of light and atoms
- Experimental test of nonclassicality criteria
- Spectrally shaped and pulse-by-pulse multiplexed multimode squeezed states of light
- On the distillation and purification of phase-diffused squeezed states
- Observation of continuous-wave squeezed light at 1550 nm
- Experimental certification of nonclassicality via phase-space inequalities
- Gaussian states under coarse-grained continuous variable measurements
- Verifying single-mode nonclassicality beyond negativity in phase space
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- Generation of three-dimensional cluster entangled state
- Experimental realization of an analog of entanglement between two Brownian particles
- Entanglement, loss, and quantumness: When balanced beam splitters are best
- Violation of steering inequality for generalized equiangular measurements
- Coarse-grained dynamics in quantum many-body systems using the maximum entropy principle
- Quantum Metrology under Coarse-Grained Measurement
- Tomogram-based quantifiers of nonclassicality dynamics in Kerr and cubic media