MS Seminar (Mathematics - String Theory)

Speaker: Sergey Ketov (Tokyo Metropolitan University)
Title: MODIFIED SUPERGRAVITY and DYNAMICAL DARK ENERGY
Date: Tue, Dec 08, 2009, 13:15 - 14:45
Place: Seminar Room at IPMU Prefab. B
Related File: 178.pdf
Abstract: Prospects of Dynamical Dark Energy as the geometrical
(curvature) effect are discussed. Some great challenges, prejudices and lessons are critically considered from the
theoretical perspective. The modified f(R) gravity, as the
suitable model framework of describing the dynamical dark energy,
is reviewed. We propose a new modified F(R) supergravity, as the
supersymmetric extension of the modified f(R) gravity, and outline
its explicit construction in curved superspace. The F(R) supergravity
is capable to simultaneously describe the dynamical dark energy
(quintessence) and dark matter with gravitino as the CDM particle. Some
connections to String Theory and Loop Quantum Gravity are outlined too.