Entanglement spectrum in one-dimensional systems
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In this paper, the authors derived the distribution of eigenvalues of the reduced density matrix of a block of length in a one-dimensional system in the scaling regime, and described the resulting entanglement spectrum by a universal scaling function depending only on the central charge of the underlying conformal field theory.Abstract:
We derive the distribution of eigenvalues of the reduced density matrix of a block of length $\ensuremath{\ell}$ in a one-dimensional system in the scaling regime. The resulting ``entanglement spectrum'' is described by a universal scaling function depending only on the central charge of the underlying conformal field theory. This prediction is checked against exact results for the $XX$ chain. We also show how the entanglement gap closes when $\ensuremath{\ell}$ is large.read more
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Entanglement spectrum of a topological phase in one dimension
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