We employ quantum state and process tomography with time-bin qubits to benchmark a city-wide metropolitan quantum communication system.Over this network,we impl
Optical edge detection,a part of image processing,plays an important role in extracting image information used in optical analog computation.In this Letter,we r
The chromatic aberration of metasurfaces limits their application.How to cancel or utilize the large chromatic dispersion of metasurfaces becomes an important i