Quantum Circuit Pruning: From NISQ Architectures to Fault-Tolerant Operations
A preprint on arXiv introduces a routing-aware circuit pruning method that removes parametric two-qubit gates when the fidelity cost of executing them outweighs their computational contribution. The approach is assessed across both noisy intermediate-scale quantum and fault-tolerant quantum computing architectures. The abstract focuses on selective gate removal driven by routing and fidelity trade-offs.
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What this could mean
- 0–2 yearsPlausible
This pruning strategy could be integrated into existing quantum compilers to reduce two-qubit gate counts for near-term devices, improving achievable circuit fidelities without hardware changes.
Routing-aware passes already exist in compilers such as Qiskit and tket, so adding a pruning layer that uses device fidelity data is largely an engineering integration effort. If the gate-selection criterion remains stable across common noise models, compiler maintainers could adopt it within two years.
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