title: Heralded generation of multipartite entanglement for one photon by using a single two-dimensional nonlinear photonic crystal.
abstract: We propose a compact scheme for the heralded generation of single-photon multipartite entanglement by using a single two-dimensional nonlinear photonic crystal. Studies have shown that by appropriate structure design, the single-photon entanglement shared among three spatially distinct optical modes can be generated through three concurrent spontaneous parametric down-conversion processes by using the other photon in an identical spatial mode as a trigger. Furthermore, we analyze the entanglement of such heralded single-photon tripartite W-type state theoretically. This method can be expanded for the heralded single-photon N-partite entanglement generation. This compact and stable quantum light source may act as a key ingredient in quantum information science.
authors.affiliation: National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China.
authors.forename: J
authors.initials: J
authors.lastname: Shi
authors.forename: P
authors.initials: P
authors.lastname: Xu
authors.forename: M L
authors.initials: ML
authors.lastname: Zhong
authors.forename: Y X
authors.initials: YX
authors.lastname: Gong
authors.forename: Y F
authors.initials: YF
authors.lastname: Bai
authors.forename: W J
authors.initials: WJ
authors.lastname: Yu
authors.forename: Q W
authors.initials: QW
authors.lastname: Li
authors.forename: H
authors.initials: H
authors.lastname: Jin
authors.forename: S N
authors.initials: SN
authors.lastname: Zhu
mesh_terms: D003198:Computer Simulation; D003460:Crystallization; D008420:Manufactured Materials; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D017785:Photons; D012542:Scattering, Radiation