4 papers
de Sitter holography from a Lorentzian torus
Kosei Fujiki, Michitaka Kohara, Javier Moreno +2
We show that the quantum entanglement between the conformal field theories (CFTs) living on the future and past boundaries in the de Sitter/conformal field theory (dS/CFT) correspo…
The Entanglement Wedge Polygon
Kosei Fujiki, Jonathan Harper, Tadashi Takayanagi +1
In this work we consider a particular codimension-1 region of a holographic spacetime which we call the entanglement wedge polygon (EWP). For a pure state and a partition of the bo…
Entropic Interpretation of Einstein Equation in dS/CFT
Kosei Fujiki, Michitaka Kohara, Kotaro Shinmyo +2
In this paper, we demonstrate that the first law of holographic pseudo-entropy, which is a non-Hermitian generalization of entanglement entropy in a two-dimensional conformal field…
Brane Cosmology from AdS/BCFT
Kosei Fujiki, Hiroki Kanda, Michitaka Kohara +1
In this paper, we study the time-dependent dynamics of an end-of-the-world (EOW) brane in AdS with a scalar field localized on the brane. We mainly studied several aspects of holog…