Entanglement Entropy in the $σ$-Model with the de Sitter Target Space
We derive the formula of the entanglement entropy between the left and right oscillating modes of the $σ$-model with the de Sitter target space. To this end, we study the theory in the \emph{cosmological gauge} in which the non-vanishing components of the metric on the two-dimensional base space are...
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arXiv
2016
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Online Access: | https://dx.doi.org/10.48550/arxiv.1609.02223 https://arxiv.org/abs/1609.02223 |