2 papers
gr-qc2021
A Spacetime Calculation of the Calabrese-Cardy Entanglement Entropy
Abhishek Mathur, Sumati Surya, Nomaan X
We calculate Sorkin's spacetime entanglement entropy of a Gaussian scalar field for complementary regions in the 2d cylinder spacetime and show that it has the Calabrese-Cardy form…
gr-qc2020
Entropy and the Link Action in the Causal Set Path-Sum
Abhishek Mathur, Anup Anand Singh, Sumati Surya
In causal set theory the gravitational path integral is replaced by a path-sum over a sample space of -element causal sets. The contribution from non-manifold-like orders…