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arXiv · 1005.2144

Solution of the fermionic entanglement problem with interface defects

Viktor Eisler·Ingo Peschel
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Abstract

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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Viktor Eisler, Ingo Peschel. 2010-07-23. Solution of the fermionic entanglement problem with interface defects. https://doi.org/10.1002/andp.201000055

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