Field Space Entanglement Entropy, Zero Modes and Lifshitz Models
arXiv:1707.00888 · doi:10.1016/j.physletb.2017.10.051
Abstract
The field space entanglement entropy of a quantum field theory is obtained by integrating out a subset of its fields. We study an interacting quantum field theory consisting of massless scalar fields on a closed compact manifold M. To this model we associate its Lifshitz dual model. The ground states of both models are invariant under constant shifts. We interpret this invariance as gauge symmetry and subject the models to proper gauge fixing. By applying the heat kernel regularization one can show that the field space entanglement entropies of the massless scalar field model and of its Lifshitz dual are agreeing.
arXiv comment13 pages, revised and extended version, accepted for publication in Physics Letters B
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