2024-10-16 オークリッジ国立研究所(ORNL)
＜関連情報＞
- https://www.ornl.gov/news/researchers-reveal-quantum-advantage-could-advance-future-sensing-devices
- https://pubs.acs.org/doi/10.1021/acsphotonics.4c00256
- https://opg.optica.org/optica/fulltext.cfm?uri=optica-5-5-628
パラレル量子センシング Parallel Quantum-Enhanced Sensing
Mohammadjavad Dowran,Aye L. Win,Umang Jain,Ashok Kumar,Benjamin J. Lawrie,Raphael C. Pooser,Alberto M. Marino
ACS Photonics Published: July 22, 2024
DOI:https://doi.org/10.1021/acsphotonics.4c00256
Abstract
Quantum metrology takes advantage of quantum correlations to enhance the sensitivity of sensors and measurement techniques beyond their fundamental classical limit, given by the shot-noise limit. The use of both temporal and spatial correlations present in quantum states of light can extend quantum-enhanced sensing to a parallel configuration that can simultaneously probe an array of sensors or independently measure multiple parameters. To this end, we use multispatial-mode bright twin beams of light, which are characterized by independent quantum-correlated spatial subregions in addition to quantum temporal correlations, to probe a four-sensor quadrant plasmonic array. We show that it is possible to independently and simultaneously measure local changes in refractive index for all four sensors with a quantum enhancement in sensitivity in the range of 22% to 24% over the corresponding classical configuration. These results provide a first step toward highly parallel spatially resolved quantum-enhanced sensing techniques and pave the way toward more complex quantum sensing and quantum imaging platforms.
量子増強プラズモニック・センシング Quantum-enhanced plasmonic sensing
Mohammadjavad Dowran, Ashok Kumar, Benjamin J. Lawrie, Raphael C. Pooser, and Alberto M. Marino
Optica Published: May 16, 2018
DOI:https://doi.org/10.1364/OPTICA.5.000628
Abstract
Quantum resources can enhance the sensitivity of a device beyond the classical shot noise limit and, as a result, revolutionize the field of metrology through the development of quantum-enhanced sensors. In particular, plasmonic sensors, which are widely used in biological and chemical sensing applications, offer a unique opportunity to bring such an enhancement to real-life devices. Here, we use bright entangled twin beams to enhance the sensitivity of a plasmonic sensor used to measure local changes in the refractive index. We demonstrate a 56% quantum enhancement in the sensitivity of a state-of-the-art plasmonic sensor when compared with the corresponding classical configuration and a 24% quantum enhancement when compared to an optimal single-beam classical configuration. We measure sensitivities on the order of 10−10 RIU/√Hz, nearly 5 orders of magnitude better than previous proof-of-principle implementations of quantum-enhanced plasmonic sensors. These results promise significant enhancements in ultratrace label-free plasmonic sensing and will find their way into areas ranging from biomedical applications to chemical detection.
