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- W3207410470 abstract "A more complete understanding of entanglement entropy in a covariant manner could inform the search for quantum gravity. We build on work in this direction by extending previous results to disjoint regions in $1+1$D. We investigate the entanglement entropy of a scalar field in disjoint intervals within the causal set framework, using the spacetime commutator and correlator, $imathbf{Delta}$ and $mathbf{W}$ (or the Pauli-Jordan and Wightman functions), respectively. A new truncation scheme for disjoint causal diamonds is presented, which follows from the single diamond truncation scheme. We investigate setups including two and three disjoint causal diamonds, as well as a single causal diamond that shares a boundary with a larger global causal diamond. In all the cases that we study, our results agree with the expected area laws. In addition, we study the mutual information in the two disjoint diamonds setup. The ease of our calculations indicate our methods to be a useful tool for numerically studying such systems. We end with a discussion of some of the strengths and future applications of the spacetime formulation we use in our entanglement entropy computations, both in causal set theory and in the continuum." @default.
- W3207410470 created "2021-10-25" @default.
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- W3207410470 date "2022-02-11" @default.
- W3207410470 modified "2023-09-25" @default.
- W3207410470 title "Entanglement entropy of disjoint spacetime intervals in causal set theory" @default.
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- W3207410470 doi "https://doi.org/10.1088/1361-6382/ac5493" @default.
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