On the Cover: Photonic discrete-time quantum walks [Invited]
The image on the cover of Chinese Optics Letters Volume 18, Issue 5, is about quantum walks, a counterpart of classical random walks, have many applications due to their neoteric features. Since they were first proposed, quantum walks have been explored in many fields theoretically and have also been demonstrated experimentally in various physical systems. Provided by G. Zhu et al., researchers from Southeast University and Beijing Computational Science Research Center, the image is based on the research presented in their article, "Photonic discrete-time quantum walks", Chinese Optics Letters 18(5) 052701 , doi 10.3788/COL202018.052701.
