Author

Sergii Strelchuk

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Preprint Jul 2026

Exponential de Finetti Theorems for Fermionic Gaussian States

We prove an exponential variant of the Gaussian de Finetti theorem: the subsystems of permutation-invariant, free-fermionic Gaussian states are well-approximated by convex combinations of almost-i.i.d. states that are Gaussian on subsets of their parts. Our result provides an error bound between the original state and...

Jędrzej Burkat, Michal Studzi'nski, Sergii Strelchuk · 0 citations