Teleportation Systems Towards a Quantum Internet

Quantum teleportation is essential for many quantum information technologies including long-distance quantum networks. Using fiber-coupled devices, including off-the-shelf optics and state-of-the-art low-noise superconducting nanowire single photon detectors, we achieve quantum teleportation of time-bin qubits at the telecommunication wavelength of 1536.5 nm. We measure teleportation fidelities of $\geq90$\% that are consistent with an analytical model of our system, which includes realistic imperfections. To demonstrate the compatibility of our setup with deployed quantum networks, we teleport qubits over 22 km of single-mode fiber while transmitting qubits over an additional 22 km of fiber. Our system, which is compatible with emerging solid-state quantum devices, is a foundation for a high-fidelity quantum internet with practical devices.