2024/10/29 by Aakash Warke, Janis Nötzel, Warke, Aakash +15
Engineering · Computer Science · #Optical Network Technologies #Photonic and Optical Devices #Quantum Information and Cryptography
paper · pdf · doi:10.48550/arxiv.2410.21800
We propose an efficient decomposition scheme for a quantum receiver that attains the Helstrom bound in the low-photon regime for discriminating binary coherent states. Our method, which avoids feedback as used in Dolinar's case, breaks down nonlinear operations into basic gates used in continuous-variable quantum computation. We account for realistic conditions by examining the impact of photon loss and imperfect photon detection, including the presence of dark counts, while presenting squeezing as a technique to mitigate these noise sources and maintain the advantage over SQL. Our scheme motivates testing quantum advantages with cubic-phase gates and designing photonic quantum computers to optimize symbol-by-symbol measurements in optical communication.