Quantum speedups come from reversible embeddings and engineered interference that identify solution classes rather than from branchwise classical parallelism, subject to limits like impossible unitary garbage erasure and contextuality.
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The Physical and Contextual Limits of Quantum Speedup
Quantum speedups come from reversible embeddings and engineered interference that identify solution classes rather than from branchwise classical parallelism, subject to limits like impossible unitary garbage erasure and contextuality.