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Author

Pouya Kananian

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Preprint Oct 2026

Barren Plateaus in Quantum Linear Combinations: Interference and Lie-Algebraic Control

A coherent sum of quantum circuits introduces interference that can alter the training signal. We distinguish a single linear combination of unitaries (LCU) from a circuit that repeatedly alternates branch operations and ancilla mixing. For a single-pass LCU, independent branches with zero matrix means cannot erase the...

Amir Koutahi, Pouya Kananian, Hans-Arno Jacobsen · 0 citations

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