Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2010-07-07
Physics
High Energy Physics
High Energy Physics - Theory
Final version, to appear in Nuclear Physics B, LaTeX, 37 pages, 1 figure
Scientific paper
We calculate parameters in the low energy gravitational effective action and the entanglement entropy in a wide class of theories characterized by improved ultraviolet (UV) behavior. These include i) local and non-local Lorentz invariant theories in which inverse propagator is modified by higher-derivative terms and ii) theories described by non-Lorentz invariant Lifshitz type field operators. We demonstrate that the induced cosmological constant, gravitational couplings and the entropy are sensitive to the way the theory is modified in UV. For non-Lorentz invariant theories the induced gravitational effective action is of the Horava-Lifshitz type. We show that under certain conditions imposed on the dimension of the Lifshitz operator the couplings of the extrinsic curvature terms in the effective action are UV finite. Throughout the paper we systematically exploit the heat kernel method appropriately generalized for the class of theories under consideration.
Nesterov Dmitry
Solodukhin Sergey N.
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