## 13 Citations

Non singular, bouncing M theory universe

- Physics
- 2020

We propose a set of equations as a simple model for non singular evolutions of a $10 + 1$ dimensional M theory universe. Our model uses ideas from Loop Quantum Cosmology and offers a solution to the…

Non singular M theory universe in loop quantum cosmology—inspired models

- PhysicsGeneral Relativity and Gravitation
- 2019

We study an M theory universe in the loop quantum cosmology—inspired models which involve a function, the choice of which leads to a variety of evolutions. The M theory universe is dominated by four…

A class of LQC-inspired models for homogeneous, anisotropic cosmology in higher dimensional early universe

- Mathematics
- 2016

The dynamics of a $$(3 + 1)$$(3+1) dimensional homogeneous anisotropic universe is modified by loop quantum cosmology and, consequently, it has generically a big bounce in the past instead of a…

Entropy of anisotropic universe and fractional branes

- Mathematics
- 2007

AbstractWe obtain the entropy of a homogeneous anisotropic universe applicable, by assumption, to the fractional branes in the universe in the model of Chowdhury and Mathur. The entropy for the 3 or…

Relativistic stars with a linear equation of state: analogy with classical isothermal spheres and black holes

- Physics
- 2008

We complete our previous investigations concerning the structure and the stability of “isothermal” spheres in general relativity. This concerns objects that are described by a linear equation of…

Spacetime Dimensionality from de Sitter Entropy

- Physics
- 2011

We argue that de Sitter universes with a small cosmological constant are entropically favored to have three spatial dimensions. The conclusion relies on the causal-patch description of de Sitter…

Variety of $$(d + 1)$$(d+1) dimensional cosmological evolutions with and without bounce in a class of LQC-inspired models

- Physics, Mathematics
- 2017

The bouncing evolution of an universe in Loop Quantum Cosmology can be described very well by a set of effective equations, involving a function sin x. Recently, we have generalised these effective…

Study of Early Universe in an M Theoretic Model

- Mathematics
- 2011

In this thesis we study early universe in the frame work of M theory. In particular We assume that the early universe is homogeneous, anisotropic, and is dominated by the mutually BPS 22'55'…

Quantum graphity: A model of emergent locality

- Physics
- 2008

Quantum graphity is a background-independent model for emergent macroscopic locality, spatial geometry and matter. The states of the system correspond to dynamical graphs on N vertices. At high…

## References

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- Physics, Mathematics
- 2001

We discuss the construction of the analog of an S-matrix for space-times that begin with a Big-Bang and asymptote to an FRW universe with nonnegative cosmological constant. When the cosmological…

M-theory observables for cosmological space-times

- Physics, Mathematics
- 2001

We discuss the construction of the analog of an S-matrix for space-times that begin with a Big-Bang and asymptote to an FRW universe with nonnegative cosmological constant. When the cosmological…

Interaction rates in string gas cosmology

- Physics
- 2004

We study string interaction rates in the Brandenberger-Vafa scenario, the very early universe cosmology of a gas of strings. This cosmology starts with the assumption that all spatial dimensions are…

Relaxing to three dimensions.

- PhysicsPhysical review letters
- 2005

The idea is that the Universe will naturally select among possible vacua through its cosmological evolution, and the configuration with the biggest filling fraction is the likeliest, and this idea is applied to the question of the number of dimensions of space.

String Windings in the Early Universe

- Physics
- 2005

We study string dynamics in the early universe. Our motivation is the proposal of Brandenberger and Vafa that string winding modes may play a key role in decompactifying three spatial dimensions. We…

Superstring gravity and the early universe

- Physics
- 1986

Ten-dimensional superstring theories have been proposed as candidates for a unified description of all the forces of nature. These theories reduce to Einstein gravity coupled to Yang-Mills…

Correspondence principle for black holes and strings

- Physics
- 1997

For most black holes in string theory, the Schwarzschild radius in string units decreases as the string coupling is reduced. We formulate a correspondence principle, which states that (i) when the…