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On classical algorithms running on quantum computing (both simulation and real hardware)

Reddit r/QuantumComputing (RSS)
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⚡ Quantum Brief
A mathematician with AI expertise tested a single perceptron on classical and quantum systems (Qiskit simulators/real hardware), finding quantum performance lagged behind classical counterparts in early 2026 experiments. The user questioned whether current quantum hardware and simulators inherently lack speed advantages for classical algorithms, suggesting limitations in handling "mundane" computational tasks efficiently. No formal publication was planned, but informal notes were offered to the quantum computing community for peer discussion, highlighting gaps between theoretical potential and practical implementation. Speculation arose about whether certain classical algorithms—like perceptrons—fundamentally resist quantum speedups, even as hardware matures, challenging optimistic quantum advantage claims. The poster cited Quantum Computation and Quantum Information (Nielsen & Chuang) as a future resource to deepen understanding, acknowledging their current knowledge gaps in quantum-classical performance tradeoffs.
On classical algorithms running on quantum computing (both simulation and real hardware)

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Hello, everyone. I have been trying to explore more about quantum computing, based on my background in mathematics, algorithms, and artificial intelligence. I don't know very much, in fact. This question may be naive, but I have run some tests on the implementation of a single perceptron on a classical computer and on quantum hardware (using Qiskit). I can provide the notes if anyone is interested in reading them (since I don't intend to try publishing). As I don't really like or rely on LLMs, I would like to ask if anyone has seen a paper or something published about why (based on my childish tests) the performance (I have compared, as I said in the title, simulation and real hardware) is worse than on a classical computer. My thoughts on this are: Current quantum simulation and hardware are not able to be faster for mundane/classical algorithms? For certain classical algorithms, there is no possibility of any performance increase? I have bought a book, Quantum Computation and Quantum Information by Nielsen and Chuang. I think after reading the book I may be able to understand more. But for now, any thoughts, comments, or notes on this topic? submitted by /u/No-Cap4379 [link] [comments]

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quantum-programming
quantum-computing
quantum-hardware
quantum-simulation

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Source: Reddit r/QuantumComputing (RSS)