Quantum teleportation using highly coherent emission from telecom C‐band quantum dots
10:20 - 10:40
Tina Müller, Matthew Anderson, Jan Huwer, Joanna Skiba-Szymanska, Andrey Krysa, Mark Stevenson, Jon Heffernan, David Ritchie and Andrew Shields Quantum network technologies rely on interference of indistinguishable photons, demanding sources of highly coherent single photons, with ideal wavelength around 1550 nm for fibre-based applications. Recently, emission of single and entangled photons from semiconductor sources in that band has been reported, but demonstration of sufficiently long coherence times has been outstanding. We show that InAs/InP quantum dots emitting in the telecom C-band can provide photons with coherence times exceeding 1 ns. These values enable near-optimal interference of quantum dot emission with a C-band laser qubit. Using entangled photons we further demonstrate teleportation of such qubits with a fidelity reaching 83.6±2.2%.
