High-fidelity entanglement swapping and generation of three-qubit GHZ state using asynchronous telecom photon pair sources
High-fidelity entanglement swapping and generation of three-qubit GHZ state using asynchronous telecom photon pair sources
We experimentally demonstrate a high-fidelity entanglement swapping and a generation of the Greenberger-Horne-Zeilinger~(GHZ) state using polarization-entangled photon pairs at telecommunication wavelength produced by spontaneous parametric down conversion with continuous-wave pump light. While spatially separated sources asynchronously emit photon pairs, the time-resolved photon detection guarantees the temporal indistinguishability of photons without …