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Book and Conference Proceedings
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Chapter and Conference Paper
Some Base for Quantum Gravity
We will explore the possibility to quantize the Gravity. For that motivation our work will use three fundamental tools from Mathematics and from Physics. These concepts are: 1) the spin (torsion), 2) the geome...
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Book
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Chapter
Erice 2001 International School of Cosmology and Gravitation
The problem that will be discussed is that of quantum gravity; first of all we will explain which road we follow in this paper and, after that, we will see if it is possible to quantize general relativity in a...
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Article
A Hamiltonian Formulation of Gravitational Theory that Allows One to Consider Curvature and Torsion as Conjugate Variables
We consider a quadratic Lagrangian, in both curvature and torsion, with the aim of exploring the possibility that torsion and curvature behave as conjugate variables satisfying the commutation relations. For t...
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Article
Einstein field equations in spinor formalism: a clifford-algebra approach
Einstein equations describing gravitational fields are expressed as a compact exterior system of spinor-valued forms. It is pointed out that Clifford algebra-valued differential forms provide a natural formali...
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Article
Torsion, string tension, and topological origin of charge and mass
We consider the analogy between torsion line defects and vortex lines in a superconductor to suggest that the electric charge and masses of elementary particles may have a geometrical origin. Just as the field...
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Article
Gravity and CP violation
The non-conservation of CP symmetry in the decay of neutralK mesons was discovered almost three decades ago. The origin of this unique phenomenon is still not well understood. There have been attempts to link it ...
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Book
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Chapter
Spin and Torsion in the Early Universe
It is shown the importance of torsion, which is a necessary geometrical feature of the space-time, when one consider the early universe and some property of string theory, and when one like to find a way towar...
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Article
On limiting field strengths in gravitation
We consider through the equivalence principle the existence of maximal and minimal field strengths in gravitation. We explore the consequences for gravitational collapse and for explaining the rotation curve o...
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Article
Torsion and gauge-invariant massive electrodynamics
We study electrodynamics in Einstein-Cartan space-time, that is, in space-time with torsion, and show an analogy with the Chern-Simons gauge-invariant massive electrodynamics. In our case, however, there is no...
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Article
Universality of charge arising from torsion
We show that in relating torsion to intrinsic unit of spin h, with the consideration that defects in spacetime topology occur in multiples of Planck length, the electric charge appears as a derived concept, sh...
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Article
Libri ricevuti e recensioni
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Article
Curvature from spin
We show that, considering the dislocation defect induced by torsion in spacetime, which behaves like a string with tension, we are lead also to defect angle and then to curvature of spacetime. The space with t...
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Article
Libri ricevuti e recensioni
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Article
A minimal time and time-temperature uncertainty principle
We show that introducing torsion in general relativity, that is, physically, considering the effect of the spin and linking the torsion to defects in spacetime topology, we can have a minimal unit of time. Als...
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Book
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Article
Torsion, minimum time, string tension and its physical implications in cosmology
We show that introducing torsion in general relativity, that is, physically, considering the effect of the spin, and linking the torsion to defects in the space-time topology we can have a minimum unit of time...
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Chapter
The Central Role of Spin in Black Hole Evaporation
1. Introduction 2. Black hole evaporation and spin effects in black hole evaporation 3. Quantization of entropy and minimum entropy 4. Further arguments on analogy between angular momentum and entropy 5. The u...
