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No Quantum Advantage in Decoded Quantum Interferometry for MaxCut
September 24, 2025 Β· Declared Dead Β· π arXiv.org
"No code URL or promise found in abstract"
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Authors
Ojas Parekh
arXiv ID
2509.19966
Category
quant-ph: Quantum Computing
Cross-listed
cs.DS
Citations
3
Venue
arXiv.org
Last Checked
5 months ago
Abstract
Decoded Quantum Interferometry (DQI) is a framework for approximating special kinds of discrete optimization problems that relies on problem structure in a way that sets it apart from other classical or quantum approaches. We show that the instances of MaxCut on which DQI attains a nontrivial asymptotic approximation guarantee are solvable exactly in classical polynomial time. We include a streamlined exposition of DQI tailored for MaxCut that relies on elementary graph theory instead of coding theory to motivate and explain the algorithm.
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