Extremal Surfaces, De Sitter Entropy And Entanglement In Ghost Systems

2019-04-19 K Narayan, CMI, Chennai

ABSTRACT :

We describe connected codim-2 extremal surfaces stretching between the future and past boundaries in the static coordinatization of de Sitter space. These are analogous to rotated versions of certain surfaces in the AdS black hole. The existence of these surfaces via the dS/CFT framework suggests the speculation that dS4 is dual to two copies of ghost-like CFTs in a thermofield-double-type entangled state. In studies of entanglement in ghost systems and “ghost-spin” chains, we show that similar entangled states in two copies of ghost-spin ensembles always have positive norm and positive entanglement.

Event Name

Seminars

Place

S N Bose Hall (HSB 210)

Start Time

15:30

End Time

16:30

External Link

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