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Lattice moments and quantum designs

Jonathan Conrad, Kristian Holm

Source record

Source: arXiv

Published: Oct 29, 2026

arXiv: 2610.40481

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Source abstract

We show that the ensemble of unimodular Gottesman−-Kitaev−-Preskill distributions fails to form a rigged quantum 33-design and quantify the replica defect that determines this failure. This is established by rederiving a second moment formula for symplectic lattices in a self-contained manner.

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