Integrated Qubit Reuse and Circuit Cutting for Large Quantum Circuit Evaluation
CoRR(2023)
摘要
Quantum computing has recently emerged as a promising computing paradigm for
many application domains. However, the size of quantum circuits that can run
with high fidelity is constrained by the limited quantity and quality of
physical qubits. Recently proposed schemes, such as wire cutting and qubit
reuse, mitigate the problem but produce sub-optimal results as they address the
problem individually. In addition, gate cutting, an alternative circuit-cutting
strategy, has not been fully explored in the field.
In this paper, we propose IQRC, an integrated approach that exploits qubit
reuse and circuit cutting (including wire cutting and gate cutting) to run
large circuits on small quantum computers. Circuit-cutting techniques introduce
non-negligible post-processing overhead, which increases exponentially with the
number of cuts. IQRC exploits qubit reuse to find better cutting solutions to
minimize the cut numbers and thus the post-processing overhead. Our evaluation
results show that on average we reduce the number of cuts by 34\% and
additional reduction when considering gate cuts.
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