Zheng, HuaixiuBaranger, Harold U2023-01-142023-01-142013-030031-90071079-7114https://hdl.handle.net/10161/26468We study photon-photon correlations and entanglement generation in a one-dimensional waveguide coupled to two qubits with an arbitrary spatial separation. To treat the combination of nonlinear elements and 1D continuum, we develop a novel Green function method. The vacuum-mediated qubit-qubit interactions cause quantum beats to appear in the second-order correlation function. We go beyond the Markovian regime and observe that such quantum beats persist much longer than the qubit lifetime. A high degree of long-distance entanglement can be generated, increasing the potential of waveguide-QED systems for scalable quantum networking.Science & TechnologyPhysical SciencesPhysics, MultidisciplinaryPhysicsJournal article2023-01-14