IBM is on the road to fault-tolerant Quantum computing, but before we get to this holy grail of quantum computing, there’s a lot of useful work that can be done using error mitigation techniques.
to the American Physical Society: “The first method, extrapolation to the zero noise limit, subsequently cancels powers of the noise perturbations by an application of Richardson’s deferred approach to the limit. The second method cancels errors by resampling randomized circuits according to a quasiprobability distribution.” Like I said, it’s technical, but the IBM researchers can hide the details within the Qiskit Runtime software environment.
For quantum computer to have an advantage over classical computer requires mapping the problem to quantum circuits with solutions better than classical approaches and being able to obtain reliable outcomes with faster runtimes. IBM Researchers are working with industry partners to identify those problems that need better solutions.
There’s a still lot that can be accomplished by mixing both classical computing with quantum. With a process called circuit knitting, quantum circuits are broken down into smaller circuits and leverage classic computing to evaluate interim results. This can leverage the quantum workflow over the available qubits.
IBM is continually working with partner companies to explore areas where quantum computing can make a difference to solving difficult problems.IBM Research is also building a middleware stack for quantum, using lessons learned from classical and GPU compute. IBM has moved from a static language and added dynamic circuits, where the output of measurements taken mid-circuit are used to define future gates in the same circuit.
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