Abstract
We develop a quantum Monte Carlo procedure to compute the Renyi mutual information of an interacting quantum many-body system at nonzero temperature. Performing simulations on a spin- model, we observe that for a subregion of fixed size embedded in a system of size , the mutual information converges at large to a limiting function which displays nonmonotonic temperature behavior corresponding to the onset of correlations. For a region of size embedded in a system of size , the mutual information divided by converges to a limiting function of temperature, with apparently nontrivial corrections near critical points.
- Received 24 August 2010
DOI:https://doi.org/10.1103/PhysRevB.82.100409
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