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arxiv: 1005.2144 · v3 · submitted 2010-05-12 · ❄️ cond-mat.stat-mech

Solution of the fermionic entanglement problem with interface defects

Viktor Eisler , Ingo Peschel This is my paper
classification ❄️ cond-mat.stat-mech
keywords defectentanglementfermionicinterfaceisingcentralchainchains
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We study the ground-state entanglement of two halves of a critical transverse Ising chain, separated by an interface defect. From the relation to a two-dimensional Ising model with a defect line we obtain an exact expression for the continuously varying effective central charge. The result is relevant also for other fermionic chains.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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    cond-mat.stat-mech 2026-06 unverdicted novelty 7.0

    An SL(2,C)-parametrized family of exactly solvable non-unitary conformal interfaces is constructed on the lattice in unitary CFTs via analytic continuation, leading to a non-unitary Cardy condition and logarithmic ent...

  2. Complex Conformal Manifolds

    hep-th 2026-06 unverdicted novelty 7.0

    Analytic continuation of marginal couplings produces complex CFTs, with no genuinely complex rational CFTs existing, and exact defect results verified in non-Hermitian Ising and fermion chains.