Ozaydin, FatihBugu, SinanYesilyurt, CanAltintas, Azmi AliTame, MarkOzdemir, Sahin Kaya2024-05-252024-05-252014681050-29471094-162210.1103/PhysRevA.89.0423112-s2.0-84903165266https://doi.org/10.1103/PhysRevA.89.042311https://hdl.handle.net/20.500.14517/769Ozdemir, Sahin Kaya/0000-0002-2625-3992; Yesilyurt, Can/0000-0003-4949-3523; Altintas, Azmi Ali/0000-0003-2383-4705; Ozdemir, Sahin K/0000-0002-2625-3992; Tame, Mark/0000-0002-5058-0248We propose an optical scheme to prepare large-scale entangled networks of W states. The scheme works by simultaneously fusing three polarization-encoded W states of arbitrary size via accessing only one qubit of each W state. It is composed of a Fredkin gate (controlled-swap gate), two fusion gates [as proposed in S. K. Ozdemir et al., New J. Phys. 13, 103003 (2011)], and an H-polarized ancilla photon. Starting with three n-qubit W states, the scheme prepares a new W state with 3(n - 1) qubits after postselection if both fusion gates operate successfully, i.e., a fourfold coincidence at the detectors. The proposed scheme reduces the cost of creating arbitrarily large W states considerably when compared to previously reported schemes.eninfo:eu-repo/semantics/openAccess[No Keyword Available]Article894WOS:000334306900005