Entanglement entropy in Fermi gases and Anderson's orthogonality catastrophe

Abstract

We study the ground-state entanglement entropy of a subsystem of size $L$ of non-interacting fermions scattered by a potential of finite range $a$. We derive a general relation between the scattering matrix and the overlap matrix and use it to prove, that for a one-dimensional symmetric potential the von Neumann entropy, the Rényi entropies and the full counting statistics are robust against potential scattering, provided that $L/a\gg 1$. The results of numerical calculations support the validity of this conclusion for a generic potential.

5+2 pages, 1 figure, published version

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Cited by in corpus (7)

• Random matrices and entanglement entropy of trapped Fermi gases
• Logarithmic Entanglement Lightcone in Many-Body Localized Systems
• Modular Hamiltonians for the massless Dirac field in the presence of a defect
• Time evolution of entanglement negativity across a defect
• Entanglement in composite free-fermion systems
• Effect of Single Impurity on Free Fermion Entanglement Entropy
• Fermionic Partial Transpose in the Overlap Matrix Framework for Entanglement Negativity