Quantum Spectrometry for Arbitrary Noise

Goldwater, Daniel; Barker, P. F.; Bassi, Angelo; Donadi, Sandro

doi:10.1103/physrevlett.123.230801

Cited by 9 publications

(4 citation statements)

References 54 publications

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“…In this context, also optomechanical experiments are of particular relevance 41,53,54,[72][73][74][75][76] . They are typically used to characterize noise [77][78][79] , and thus possibly discriminate between standard and non-standard noise sources 41 .…”

Section: Non-interferometric Testsmentioning

confidence: 99%

Testing the foundation of quantum physics in space via Interferometric and non-interferometric experiments with mesoscopic nanoparticles

et al. 2021

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Quantum technologies are opening novel avenues for applied and fundamental science at an impressive pace. In this perspective article, we focus on the promises coming from the combination of quantum technologies and space science to test the very foundations of quantum physics and, possibly, new physics. In particular, we survey the field of mesoscopic superpositions of nanoparticles and the potential of interferometric and non-interferometric experiments in space for the investigation of the superposition principle of quantum mechanics and the quantum-to-classical transition. We delve into the possibilities offered by the state-of-the-art of nanoparticle physics projected in the space environment and discuss the numerous challenges, and the corresponding potential advancements, that the space environment presents. In doing this, we also offer an ab-initio estimate of the potential of space-based interferometry with some of the largest systems ever considered and show that there is room for tests of quantum mechanics at an unprecedented level of detail.

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Section: Non-interferometric Testsmentioning

confidence: 99%

Testing the foundation of quantum physics in space via Interferometric and non-interferometric experiments with mesoscopic nanoparticles

et al. 2021

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“…[13] We have noticed recent efforts exploring the detection of noise spectra using harmonic oscillators. [14][15][16] The basic ideas in these works are enacted on the laser-cooled trapped ions prepared in vibrational ground state and varied with resonance frequencies. With these singleion sensors, the intrinsic noise spectra of the ion-trap potentials were experimentally identified and demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Building and characterizing a stylus ion-trap system

Cui 崔,

Wei 魏,

Li 李

et al. 2024

Chinese Phys. B

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Cold trapped ions can be excellent sensors for ultra-precision detection of physical quantities, which strongly depends on the measurement situation at hand. The stylus ion trap, formed by two concentric cylinders over a ground plane, holds the promise of relatively simple structure and larger solid angle for optical access and fluorescence collection in comparison with the conventional ion traps. Here we report our fabrication and characterization of the first stylus ion trap constructed in China, aiming for studying quantum optics and sensing weak electric fields in the future. We have observed the stable confinement of the ion in the trapping potential for more than two hours and measured the heating rate of the trap to be $d\epsilon /dt=7.10\pm 0.13$ meV/s by the Doppler recooling method. Our work starts a way to building practical quantum sensors with high efficiency of optical collection and with ultimate goal for contributing to future quantum information technology.

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“…However, in many occasions, the spectral density cannot be microscopically derived from first principle. Thus, a precisely sensing to the spectral density of quantum reservoir is strongly necessary [37][38][39][40][41]. Several nonunitary-encoding schemes * anjhong@lzu.edu.cn of senseing the quantum reservoir have been proposed.…”

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confidence: 99%

Threshold for a discrete-variable sensor of quantum reservoirs

Wu,

Peng,

Bai

et al. 2021

Preprint

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Quantum sensing employs quantum resources of a sensor to attain a smaller estimation error of physical quantities than the limit constrained by classical physics. To measure a quantum reservoir, which is significant in decoherence control, a nonunitray-encoding sensing scheme becomes necessary. However, previous studies showed that the reservoir-induced degradation to quantum resources of the sensor makes the errors divergent with the increase of encoding time. We here propose a scheme to use N two-level systems as the sensor to measure a quantum reservoir. A threshold, above which the shot-noise-limited estimation error saturates or even persistently decreases with the encoding time, is uncovered. Our analysis reveals that it is due to the formation of a bound state of the total sensor-reservoir system. Solving the outstanding error-divergency problem in previous studies, our result supplies an insightful guideline in realizing a sensitive measurement of quantum reservoirs.

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Quantum Spectrometry for Arbitrary Noise

Cited by 9 publications

References 54 publications

Testing the foundation of quantum physics in space via Interferometric and non-interferometric experiments with mesoscopic nanoparticles

Testing the foundation of quantum physics in space via Interferometric and non-interferometric experiments with mesoscopic nanoparticles

Building and characterizing a stylus ion-trap system

Threshold for a discrete-variable sensor of quantum reservoirs

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