Quantum conformance test
| Autor: | Giuseppe Ortolano, Marco Genovese, Ivo Pietro Degiovanni, ELENA LOSERO, Pauline Boucher, Ivano Ruo-Berchera |
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| Předmět: |
Quantum Physics
Multidisciplinary Physics FOS: Physical sciences SciAdv r-articles 01 natural sciences absolute calibration 010309 optics 0103 physical sciences Physical and Materials Sciences Quantum Physics (quant-ph) 010306 general physics Optics (physics.optics) Physics - Optics Research Article |
| Zdroj: | Quantum Information and Measurement VI 2021 Science Advances |
| Popis: | Description A practical quantum scheme is shown to have a performance beyond the classical limits in monitoring a manufacturing process. We introduce a protocol addressing the conformance test problem, which consists in determining whether a process under test conforms to a reference one. We consider a process to be characterized by the set of end products it produces, which is generated according to a given probability distribution. We formulate the problem in the context of hypothesis testing and consider the specific case in which the objects can be modeled as pure loss channels. We demonstrate theoretically that a simple quantum strategy, using readily available resources and measurement schemes in the form of two-mode squeezed vacuum and photon counting, can outperform any classical strategy. We experimentally implement this protocol, exploiting optical twin beams, validating our theoretical results, and demonstrating that, in this task, there is a quantum advantage in a realistic setting. |
| Databáze: | OpenAIRE |
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