Introduces practical witnesses of fermionic non-Gaussianity via antiflatness from covariance matrices, with two efficient measurement protocols, a purity-corrected version for mixed states, and experimental results on an IQM processor showing noise effects and requirements for pseudorandom states.
Debertolis, Natural super-orbitals representation of many-body operators (2025), arXiv:2507.10690 [cond- mat.str-el]
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Practical Tests and Witnesses of Fermionic non-Gaussianity
Introduces practical witnesses of fermionic non-Gaussianity via antiflatness from covariance matrices, with two efficient measurement protocols, a purity-corrected version for mixed states, and experimental results on an IQM processor showing noise effects and requirements for pseudorandom states.