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Machine Learning Applied to Quantum Synchronization-Assisted Probing
摘要： A probing scheme is considered with an accessible and controllable qubit, used to probe an out-of equilibrium system consisting of a second qubit interacting with an environment. Quantum spontaneous synchronization between the probe and the system emerges in this model and, by tuning the probe frequency, can occur both in-phase and in anti-phase. The capability of machine learning in this probing scheme is analyzed based on quantum synchronization. An artificial neural network is used to infer, from a probe observable, main dissipation features, such as the environment Ohmicity index. The efficiency of the algorithm in the presence of some noise in the dataset is also considered. It is shown that the performance in either classification and regression is significantly improved due to the in/anti-phase synchronization transition. This opens the way to the characterization of environments with arbitrary spectral densities.
关键词： quantum synchronization,quantum probing,machine learning
更新于2025-09-23 15:23:52
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synchronization in a coupled optomechanical system with periodic modulation
摘要： Based on the concepts of quantum synchronization and quantum phase synchronization proposed by A. Mari et al. [Phys. Rev. Lett. 111, 103605 (2013)], we introduce and characterize the measure of a more generalized quantum synchronization called quantum φ synchronization under which pairs of variables have the same amplitude and possess the same φ phase shift. Naturally, quantum synchronization and quantum antisynchronization become special cases of quantum φ synchronization. Their relations and differences are also discussed. To illustrate these theories, we investigate the quantum φ synchronization and quantum phase synchronization phenomena of two coupled optomechanical systems with periodic modulation and show that quantum φ synchronization is more general as a measure of synchronization. We also show the phenomenon of quantum antisynchronization when φ = π.
关键词： quantum phase synchronization,optomechanical systems,periodic modulation,quantum synchronization,quantum φ synchronization
更新于2025-09-23 15:21:01