| DATE: |
2010-12-21 11:00 - 12:00 |
| PLACE: |
Kenkyu Honkan 1F Meeting Room 1 |
| TITLE: |
Quantum Gravity and Cosmological Density Perturbations |
| CONTACT: |
SHIBA Shotaro, sshiba-AT-post.kek.jp |
| SPEAKER: |
Ms. Reiko Toriumi (University of California, Irvine) |
| LANGUAGE: |
English |
| ABSTRACT: |
The talk will focus on possible cosmological consequences of a running Newton’s constant G(d’Alembertian), as suggested by the nontrivial ultraviolet fixed point scenario in the quantum field-theoretic treatment of Einstein gravity with a cosmological constant term.
I will first review the main results coming from the study of the renormalization group in quantum field theories in order to motivate the formulation of a running G. I will then go on to discuss possible effects a scale-dependent coupling might have on large scale cosmological density perturbations and on the cosmological slip function.
Reference:
H. W. Hamber and R. Toriumi, Phys. Rev. D 82 (2010) 043518, arXiv:1006.5214 [gr-qc]. |
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