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Researchers from Singapore University of Technology and Design have demonstrated that IBM's 70-qubit quantum experiment can be classically simulated in under an hour using tensor networks, significantly reducing resource requirements. This breakthrough provides a critical verification tool for validating actual quantum computer outputs while helping to benchmark the true complexity limits of near-term devices.

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Researchers Simulate 70-Qubit Experiment in 37.3 Minutes

Quantum ZeitgeistAugust 18, 20264 min read

The largest intermediate tensor required only 235 complex64 entries to simulate IBM’s 70-qubit quantum experiment, a reduction of 256 times compared to previous estimations. This simulation completed in 37. 3 minutes using 32 nodes, offering a new benchmark for validating quantum computations.

Hidetaka Manabe of the Singapore University of Technology and Design and colleagues have, for the first time, classically simulated IBM’s 70-qubit doped Clifford random circuit sampling experiment using a deterministic tensor network approach. Previously, simulating such a complex quantum circuit required substantial computational resources, but the team completed all 2051 amplitude batches in 37.3 minutes using 32 nodes. The largest intermediate tensor required only 235 complex64 entries, a times smaller…

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