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| Paper IPM / P / 14309 |
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It is established that physical observables in local quantum field theories should be invariant under invertible field redefinitions. It is then expected that this statement should be true for the entanglement entropy and moreover that, via the gauge/gravity correspondence, the recipe for computing entanglement entropy holographically should also be invariant under field redefinitions in the gravity side. We use this fact to fix the recipe for computing holographic entanglement entropy (HEE) for f(R,Rμν) theories which could be mapped to Einstein gravity. An outcome of our prescription is that the minimal surfaces for the f(R,Rμν) theories always have vanishing trace of extrinsic curvature and hence the HEE may be evaluated using the Wald entropy functional.
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