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- W3104960135 abstract "We study the entanglement of two disjoint blocks in spin-1/2 chains obtained by merging solvable models, such as XX and quantum Ising models. We focus on the universal quantities that can be extracted from the R'enyi entropies S_alpha. The most important information is encoded in some functions denoted by F_alpha. We compute F_2 and we show that F_alpha-1 and F_{v.N.}, corresponding to the von Neumann entropy, can be negative, in contrast to what observed in all models examined so far. An exact relation between the entanglement of disjoint subsystems in the XX model and that in a chain embodying two quantum Ising models is a by-product of our investigations." @default.
- W3104960135 created "2020-11-23" @default.
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- W3104960135 date "2012-01-01" @default.
- W3104960135 modified "2023-10-02" @default.
- W3104960135 title "New insights into the entanglement of disjoint blocks" @default.
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- W3104960135 doi "https://doi.org/10.1209/0295-5075/97/17007" @default.
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