(a) Schematic of the experiment setup. A superconducting silicon-photonic chip that performs optimal Bell-state measurements is used as the server for MDI-QKD, which allows Alice and Bob to ...

Figure 1: Sketch of the experiment. H2 molecules are ionized by a phase-locked pair of attosecond XUV pulses. The quantum system consisting of molecular ion and photo-electron is probed by few ...