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- W2891675944 abstract "We develop a Green's function approach to compute R'{e}nyi entanglement entropy on lattices and fuzzy spaces. The R'{e}nyi entropy resulting from tracing out an arbitrary collection of subsets of coupled harmonic oscillators is written as zero temperature partition function generated by an Euclidean action with $n$-fold step potential. The associated Green's function is explicitly constructed and an alternative new formula for the R'{e}nyi entropy is obtained. Finally it is outlined how this approach can be used to go beyond the gaussian state and include interaction by writing a perturbative expansion for the entanglement entropy ." @default.
- W2891675944 created "2018-09-27" @default.
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- W2891675944 date "2019-05-01" @default.
- W2891675944 modified "2023-09-27" @default.
- W2891675944 title "Green's function approach to entanglement entropy on lattices and fuzzy spaces" @default.
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- W2891675944 doi "https://doi.org/10.1016/j.physletb.2019.03.019" @default.
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