Fig. 2
From: A von-Neumann-like photonic processor and its application in studying quantum signature of chaos
The first program to distinguish regular and chaotic behaviors. a Logic diagram. 13 temporal modes are created in program and each layer in this figure represents one loop in Fig. 1b. Pairs of modes are controlled to be coupled and performed with two-level operations according to instructions. These operations are represented by circles with two dots, and those without dots stand for the phase gates. For the quantum kicked-top model utilized here, each period of evolution \(U\) comprises 9 layers of two-level operations based on Trotter expansion and 1 layer of phase gate, and totally \(n=4\) periods are compiled in this program. b, c Running results with parameters \(k=1\) and \(k=12\), respectively, in the form of Husimi distribution (phase space). Compared to (c), the chaotic region, (b) corresponding to regular region is less dispersive
