Speaker
Description
An exact solution for the bulk five-dimensional geometry is derived for F(R) gravity with nonflat de
Sitter 3-branes located at the M4 × Z2 orbifold boundaries. The corresponding form of F(R) that leads to
such an exact solution of the bulk metric is derived, which turns out to have all positive integer powers of R.
In such a scenario, the stability issue of the modulus (radion field) is analyzed critically for different
curvature epochs in both Einstein and Jordan frames. The radion in the effective 4D theory exhibits
a phantom epoch, making this model viable for a nonsingular bounce. Simultaneous resolution of the
gauge-hierarchy problem is exhibited through the resulting stable value of the radion field in the effective
3 + 1-dimensional theory.
| indrani.physics1@gmail.com | |
| Affiliation | NIT, Rourkela |
