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четверга к секретарю семинара - Егору Гончарову - goncharov@lpi.ru ]
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22 апреля 2019 г., понедельник (!), в 12.15 (!)
Felipe Diaz
Entangled massive observers on de Sitter space
De Sitter space, unlike its negatively curved relative, consists of two
disconnected boundaries and a causally disconnected interior. We argue that the
connectedness properties of de Sitter space naturally encode the notion
entanglement. Considering the entanglement between the two interior Rindler
wedges, we show--with no need of holography--that the entanglement entropy
between two antipodal and causally disconnected observers is given by a quarter
of the area of a pair minimal surfaces. These surfaces are the set of fixed
points of an $S^2/\mathbb Z_q$ orbifold and their total area. The set of fixed
points of the $\mathbb Z_q$ action can be effectively described in terms of the
Liouville conformal field theory. We show that in the large $q$ limit, the
Liouville central charge matches the asymptotic dS$_3$ central charge
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