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Paper detail

Surface and bulk entanglement in free-fermion chains

We consider free-fermion chains where full and empty parts are connected by a transition region with narrow surfaces. This can be caused by a linear potential or by time evolution from a step-like initial state. Entanglement spectra, entanglement entropies and fluctuations are determined for subsystems either in the surface region or extending into the bulk. In all cases there is logarithmic behaviour in the subsystem size, but the prefactors in the surface differ from those in the bulk by 3/2. A previous fluctuation result is corrected and a general scaling formula is inferred from the data.

preprint2014arXivOpen access
Viktor EislerIngo Peschel
cond-mat.stat-mech
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Viktor EislerIngo Peschel

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