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OnderzoekVan Swinderen Institute

Lunch seminar David Stefanyszyn

When:Th 14-04-2016 12:30 - 13:30
Where:5111.0135

Speaker:

´╗┐David Stefanyszyn

Affiliation:

´╗┐University of Nottingham

Title:

Vacuum Energy Sequestering

Abstract:

In this talk I will discuss the main aspects of the cosmological constant problem and present a mechanism that sequesters the matter loop contributions to the cosmological constant from classical gravity. I will focus on the global nature of the cosmological constant problem and explain why its theoretical value is sensitive to high energy physics. Motivated by these issues, I will show how one can write down a local field theory which only affects the trace of Einstein's field equations in the extreme infra-red. This ensures that only the troublesome loop corrections to the cosmological constant are gravitationally decoupled, with all local gravitational sources unaffected.