Hidden conformal symmetry and pair production near the cosmological horizon in Kerr-Newman-Taub-NUT-de Sitter spacetime

TL;DR

This paper explores hidden conformal symmetry at the cosmological horizon of Kerr-Newman-Taub-NUT-de Sitter spacetime, applying conformal field theory techniques to understand entropy, scattering, and pair production phenomena.

Contribution

It extends the Kerr/CFT correspondence to the cosmological horizon in this spacetime, revealing new insights into its conformal symmetry and related physical processes.

Findings

Entropy computed via Cardy formula matches expectations.

Scattering equations agree with 2D conformal field theory results.

Pair production occurs near the horizon under near extremal conditions.

Abstract

We show that the study of hidden conformal symmetry that associates to the Kerr/CFT correspondence can also apply to the cosmological horizon in Kerr-Newman-Taub-NUT-de Sitter spacetime. This symmetry allows one to employ some two dimensional conformal field theory methods to understand the properties of the cosmological horizon. The entropy can be understood by using the Cardy formula, and the equation for scattering process in the near region has an agreement with the one obtained from a two point function in two dimensional conformal field theory. We also show that pair production can occur near the cosmological horizon in Kerr-Newman-Taub-NUT-de Sitter for near extremal conditions.