Efficient fusion of photonic W-states with nonunitary partial-swap gates

• Main Authors: Wei, Hai-Rui, Liu, Wen-Qiang, Kwek, Leong-Chuan
• Other Authors: Majulab @ NTU
• Format: Article
• Language: English
• Published: 2021
• Subjects: Science::Physics; W-state Fusion; Multipartite Entanglement
• Online Access: https://hdl.handle.net/10356/146331
• Institution: Nanyang Technological University

We introduce a nonunitary partial-swap gate for fusing arbitrary small-sized photonic W-states into a large-scale entangled network of W-state efficiently without ancillary photons. A partial-swap gate is designed in an optical architecture based on linear optics elements. By introducing auxiliary d...