• Corpus ID: 119401480

k-Essence, Avoidance of the Weinberg's Cosmological Constant No-Go Theorem and Other Dark Energy Effects of Two Measures Field Theory

@article{Guendelman2006kEssenceAO,
  title={k-Essence, Avoidance of the Weinberg's Cosmological Constant No-Go Theorem and Other Dark Energy Effects of Two Measures Field Theory},
  author={Eduardo I. Guendelman and Alexander B. Kaganovich},
  journal={arXiv: General Relativity and Quantum Cosmology},
  year={2006}
}
The dilaton-gravity sector of the Two Measures Field Theory (TMT) is explored in detail in the context of cosmology. The model possesses scale invariance which is spontaneously broken due to the intrinsic features of the TMT dynamics. The dilatondependence of the effective Lagrangian appears only as a result of the spontaneous breakdown of the scale invariance. If no fine tuning is made, the effective �-Lagrangian p(�,X) depends quadratically upon the kinetic energy X. Hence TMT may represent… 
6 Citations

On Dark Energy, Weyl’s Geometry, Different Derivations of the Vacuum Energy Density and the Pioneer Anomaly

Two different derivations of the observed vacuum energy density are presented. One is based on a class of proper and novel generalizations of the (Anti) de Sitter solutions in terms of a family of

Monopole Solutions in a Two Measure Field Theory and the Evolution of Vacuum Bubbles

The existence of point-like topological defects, or monopoles, is an inevitable consequence of many grand unified theories(GUTs)[1][2][3][4]. This led to extensive research of these objects starting

On Dark Energy, Weyl’s Geometry and Different Derivations of the Vacuum Energy Density

Two different derivations of the observed vacuum energy density are presented. One is based on a class of proper and novel generalizations of the (Anti) de Sitter solutions in terms of a family of

Eddington-Born-Infeld action for dark matter and dark energy

We argue that Einstein gravity coupled to a Born-Infeld theory provides an attractive candidate to represent dark matter and dark energy. For cosmological models, the BornInfeld field has an equation

Weyl’s Geometry solves the Riddle of Dark Energy

We rigorously prove why the proper use ofWeyl�s Geometry within the context of Friedman-Lemaitre-Robertson-Walker cosmological models can account for both the origins and the value of the observed

Quantization in Astrophysics, Brownian Motion, and Supersymmetry

The present book discusses, among other things, various quantization phenomena found in Astrophysics and some related issues including Brownian Motion. With recent discoveries of exoplanets in our