Topic
An approach to quantum computing that encodes qubits in photons, using nonlinear optics or lasers to generate and manipulate entangled light states.
Xanadu will move its photon-counting detectors and silicon nitride photonics onto GlobalFoundries' 300mm line in Malta, New York, under a multi-year deal. Its scaling case now depends on how chips from a commercial fab perform.
Reality
Physicists at Kyoto and Hiroshima universities built an optical circuit that identifies three-photon W states in one shot, with an averaged fidelity of 0.871. That clears the two-thirds benchmark comfortably, though only three photons have been tested so far.
Reality
Kyoto and Hiroshima University physicists built an optical circuit that identifies three-photon W states in a single measurement. If it scales, labs checking larger entangled states could skip tomography, whose data needs grow exponentially with photon number.
Reality
NTT led a 7.0 billion yen Series A2 a month after the MoQuren demonstrator switched on. Workloads, access terms and pricing are still undisclosed.
Reality
An Ottawa and Max Planck team ran spontaneous parametric down-conversion on solar light and measured a Bell parameter of 2.54. The parity with lasers is quoted per unit of pump bandwidth.
Reality