We study holographic entanglement entropy in dS/CFT and introduce timelike entanglement
entropy in CFTs. Both of them take complex values in general and are related with each …

A bstract We define a new complex-valued measure of information called the timelike
entanglement entropy (EE) which in the boundary theory can be viewed as a Wick rotation …

We refine previous investigations on de Sitter space and extremal surfaces anchored at the
future boundary I+. Since such surfaces do not return, they require extra data or boundary …

A bstract We present a class of dS/CFT correspondence between two-dimensional CFTs
and three-dimensional de Sitter spaces. We argue that such a CFT includes an SU (2) WZW …

A bstract A long-standing and intriguing question is: does the holographic principle apply to
cosmologies like de Sitter spacetime? In this work, we consider a half dS spacetime wherein …

A bstract We study the entanglement entropy for time-like subsystem in two-dimensional
boundary conformal field theory (BCFT) both from the field theory and holographic point of …

A bstract In this work, we investigate the time evolution of the pseudo-(Rényi) entropy after
local primary operator quenches in 2D CFTs with\(T\overline {T}/J\overline {T}\)-deformation …

A bstract In the context of dS 3/CFT 2, we propose a timelike entanglement entropy defined
by the renormalization group flow. This timelike entanglement entropy is calculated in CFT …

In this Letter, we propose a holographic duality for classical gravity on a three-dimensional
de Sitter space. We first show that a pair of SU (2) Chern-Simons gauge theories reproduces …

A bstract In order to study the pseudo entropy of timelike subregions holographically, the
previous smooth space-like extremal surface was recently generalized to mix space-like and …