This invention describes a method for precisely simulating quantum circuits by converting them into a classical Ising model represented as a graph. It then uses specialized algorithms, such as bucket elimination, to calculate the exact probabilities of the quantum circuit's outcomes without approximations. This exact simulation is intended for verifying, calibrating, or benchmarking actual quantum computing hardware.
Why it matters: Since 2022, quantum computing hardware has continued to advance in scale and complexity, increasing the critical need for precise methods to calibrate and validate these systems. Improvements in classical computing power and cloud infrastructure may make exact simulation of larger quantum circuits, within the method's computational limits, more practical for benchmarking purposes.
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