Ruoyu Yin

Aug 21, 2024 | link.aps.org | Yiming Pan |Ruoyu Yin |Advanced Materials

We present the construction of a reciprocal electromagnetic field by extending the Berry curvatures into four-dimensional energy-momentum space. The resulting governing equations, termed Berry-Maxwell equations, are derived by incorporating Lorentz invariance to constrain the parameter space of energy-momentum. Notably, these Berry-Maxwell equations exhibit dual and self-dual structures compared to the Maxwell equations.

Jun 24, 2024 | link.aps.org | Ruoyu Yin |Advanced Materials |Bar Ilan |Qingyuan Wang

Repeatedly monitored quantum walks with a rate 1/τ yield discrete-time trajectories which are inherently random. With these paths the first-hitting time with sharp restart is studied. We find an instability in the optimal mean hitting time, which is not found in the corresponding classical random-walk process. This instability implies that a small change in parameters can lead to a rather large change of the optimal restart time.

Sep 15, 2023 | onlinelibrary.wiley.com | Li Chen |Xu Han |Xudong Zhou |Ruoyu Yin

Conflict of Interest The authors declare no conflict of interest. Supporting Information Filename Description lpor202300377-sup-0001-SuppMat.pdf331.7 KB Supporting Information References 1, , , , , , , , , , Opt. Express 2004, 12, 1583. 2, , , , , , Optica 2019, 6, 1342. 3, , , , , , Proc. IEEE 2018, 106, 2246. 4, , , , , Laser Photonics Rev. 2018, 12, 1700256. 5, , Sci. Bull. 2018, 63, 1267. 6, , , , IEEE J. Sel. Top. Quantum Electron. 2019, 25, 1. 7, Appl. Sci.