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Benchmarking 16-element quantum search algorithms on superconducting quantum processors

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arxiv 2007.06539 v3 pith:P2U2V6O7 submitted 2020-07-13 quant-ph cs.DS

classification quant-phcs.DS
keywords quantumalgorithmsprocessorssearchperformanceactualalgorithmaround
verification ladder T0 review T1 audit T2 compute T3 formal
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We present experimental results on running 4-qubit unstructured search on IBM quantum processors. Our best attempt attained probability of success around 24.5%. We try several algorithms and use the most recent developments in quantum search to reduce the number of entangling gates that are currently considered the main source of errors in quantum computations. Comparing theoretical expectations of an algorithm performance with the actual data, we explore the hardware limits, showing sharp, phase-transition-like degradation of performance on quantum processors. We conclude that it is extremely important to design hardware-aware algorithms and to include any other low level optimizations on NISQ devices.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Quantum mechanics can find a needle in a haystack every time

    quant-ph 2025-06 conditional novelty 6.0 of 10

    A deterministic variant of Grover's search algorithm was demonstrated on photonic integrated circuits, achieving a 99.77% average success probability for a single marked element across all database sizes from 4 to 10.

  2. Multi-Controlled Quantum Gates in Linear Nearest Neighbor

    quant-ph 2025-05 conditional novelty 6.0 of 10

    Multi-controlled X and SU(2) gates on linear-nearest-neighbor qubit arrays require at most 4k+8n-16 and 4k+8n-14 CNOT gates, respectively, improving earlier bounds.

  3. Practical Fidelity Limits of Toffoli Gates in Superconducting Quantum Processors

    quant-ph 2025-09 reject novelty 3.0 of 10

    Benchmarking a decomposed Toffoli gate on IBM quantum hardware yields 56-64% state fidelities, but the claimed state-dependent error pattern is confounded by using different devices.

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