A new third-order separability witness constructs a 4x4 matrix from local randomized measurement invariants whose negative minimum eigenvalue certifies entanglement with dimension-independent sample complexity.
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Entanglement asymmetry for space-inversion symmetry of free fermions on honeycomb lattices exhibits nonanalytic dependence on energy imbalance and persists after a quench to the symmetric point due to flat bands in certain geometries.
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Third-Order Local Randomized Measurements for Finite-size Entanglement Certification
A new third-order separability witness constructs a 4x4 matrix from local randomized measurement invariants whose negative minimum eigenvalue certifies entanglement with dimension-independent sample complexity.
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Dynamics of entanglement asymmetry for space-inversion symmetry of free fermions on honeycomb lattices
Entanglement asymmetry for space-inversion symmetry of free fermions on honeycomb lattices exhibits nonanalytic dependence on energy imbalance and persists after a quench to the symmetric point due to flat bands in certain geometries.