On de Sitter radiation via quantum tunneling

Abstract

We discuss why the tunneling picture does not necessarily lead to Hawking radiation from the de Sitter horizon. The experience with the condensed matter analogs of event horizon suggests that the de Sitter vacuum is stable against the Hawking radiation. On the other hand the detector immersed into the de Sitter background will detect the radiation which looks as thermal with the effective temperature twice larger than the Hawking temperature associated with the cosmological horizon.

15 pages, no figures, IJMPD style, version submitted to IJMPD

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• Classical radiation by free-falling charges in de Sitter spacetime
• Hawking radiation as tunneling from squashed Kaluza-Klein black hole
• Thermodynamics and decay of de Sitter vacuum
• Vacua on the Brink of Decay
• Unruh effect in vacua with anisotropic scaling: Applications to multilayer graphene
• Our Universe from the cosmological constant
• Reflection and Transmission at the Apparent Horizon during Gravitational Collapse
• 50 years in the Landau Institute environment