Cosmological solutions of gravity coupled to scalar fields, with arbitrary scalar potential, were recently shown to be geodesics in an appropriately augmented, and conformally rescaled, target space. Here we obtain these geodesics as solutions of the Euler-Lagrange equations of a relativistic particle action. As an application, we find some exact (flat and curved) cosmologies for models with N ...

We consider branes N in a Schwarzschild-AdS(n+2) bulk, where the stress energy tensor is dominated by the energy density of a scalar fields map φ : N → S with potential V , where S is a semiRiemannian moduli space. By transforming the field equation appropriately, we get an equivalent field equation that is smooth across the singularity r = 0, and which has smooth and uniquely determined soluti...

Big – Bang and Big – Crunch (BB-BC) optimization method for multioptimization of economic load dispatch and emission dispatch of thermal power generating stations is presented using weighted sum method, trade-off solutions are obtained assuming decision makers (DM) requirements by solving optimal power flows. BB-BC optimization which is a nonderivative, population search optimization procedure ...

We determine the inner product on Hilbert space of wavefunctions universe by imposing Hermiticity quantum Hamiltonian in context minisuperspace model. The corresponding probability density reproduces successfully classical distribution $\hbar \to 0$ limit, for closed universes filled with a perfect fluid index $w$. When $-1/3<w\le 1$, wavefunction is normalizable and becomes vanishingly small a...

We consider a cosmological scenario within the KKLT framework for moduli stabilization in string theory. The universal open string tachyon of decaying non-BPS D-brane configurations is proposed to drive eternal topological inflation. Flux-induced ‘warping’ can provide the small slow-roll parameters needed for successful inflation. Constraints on the parameter space leading to sufficient number ...

The AdS/CFT correspondence allows us to map a dynamical cosmology to a dual quantum field theory living on the boundary of spacetime. Specifically, we study a five-dimensional model cosmology in type IIB supergravity, where the dual theory is an unstable deformation of N = 4 supersymmetric SU(N) gauge theory on IR×S3. A one-loop computation shows that the coupling governing the instability is a...