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106 papers
Boundary Conditions and Entanglement in Anti-de Sitter Space
Konstantinos Boutivas, Dimitrios Katsinis, Georgios Pastras +2
We study the entanglement entropy of a conformally coupled scalar field at its ground state in -dimensional AdS space in global coordinates. We consider spherical entangling…
A simple mechanism for the enhancement of the inflationary power spectrum
I. Dalianis, A. Katsis, N. Tetradis
The background evolution in two-field inflation can feature two distinct stages, corresponding to the evolution along two successive field directions. When the second stage occurs…
Computing - and -functions from entanglement
Konstantinos Boutivas, Dimitrios Katsinis, Georgios Pastras +1
We confirm the direct connection between entanglement entropy and the notion of irreversibility in the renormalization-group flow in the context of a simple theory for which a calc…
Entanglement on a Sphere
Konstantinos Boutivas, Dimitrios Katsinis, Georgios Pastras +2
We study the entanglement entropy of a massive scalar field in the background of the Einstein universe. We determine numerically the structure of the UV-divergent terms. We study a…
Entanglement Entropy of a Scalar Field in Anti-de Sitter Space
Konstantinos Boutivas, Dimitrios Katsinis, Ioannis Papadimitriou +2
We study the entanglement entropy of a free massive scalar field at its ground state in (3+1)-dimensional AdS space in global coordinates. We consider spherical entangling surfaces…
Entanglement Entropy as a Probe Beyond the Horizon
Konstantinos Boutivas, Dimitrios Katsinis, Georgios Pastras +1
The entanglement entropy of a free field in de Sitter space is enhanced by the squeezing of its modes. We show analytically that the expansion induces a term in the entanglement en…