Photonic variational circuits exhibit polynomial gradient decay in some postselection regimes and exponential decay in others, governed by postselection geometry rather than Hilbert-space dimension.
Exploiting symmetry in variational quantum machine learning
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Pre-Asymptotic Trainability in Photonic Variational Circuits under Postselection
Photonic variational circuits exhibit polynomial gradient decay in some postselection regimes and exponential decay in others, governed by postselection geometry rather than Hilbert-space dimension.