Holographic de Sitter Spacetime and Quantum Corrections to The Cosmological Constant

Understand

A dynamical aspect of quantum gravity on de Sitter spacetime is investigated by holography or the dS/CFT correspondence.

• We show that de Sitter spacetime emerges from a free Sp(N) vector model by complexifying the ghost fields and flowing them in parallel to the imaginary axis.
• We confirm that the emergence of de Sitter spacetime is ensured by conformal symmetry.
• We also compute the quantum corrections to the cosmological constant up to the next-to-leading order of the 1/N expansion in a proposed holographic approach.