The Globe and Mail reports in its Thursday edition that Toronto start-up Xanadu Quantum Technologies has reached a milestone in light-based quantum computing. The Globe's Ivan Semeniuk writes that researchers created a single chip that uses a powerful error-detection code in a pulse of laser light. Harnessing multiple chips together could lead to a reliable quantum computer with practical applications. Xanadu's Zachary Vernon said, "This is something that's been on our road map for a long time." A technical description of the chip was published Wednesday in the journal Nature. University of Arizona in Tucson professor Daniel Soh says the development is significant "because the chip platform is supposed to be scalable." Over all, the goal remains to create a computer that runs on qubits instead of the standard bits of a conventional digital system. Many companies, including Google, IBM and Microsoft, face a common challenge in developing quantum computers: Their qubits are highly sensitive to disturbances and difficult to isolate. To mitigate errors, qubits can monitor each other for failures, but this redundancy requires significantly more qubits to create a reliable computer capable of solving real-world problems.