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- De Sitter Relativity: a New Road to Quantum Gravity?
- Universidade Estadual Paulista (UNESP)
- The Poincar, group generalizes the Galilei group for high-velocity kinematics. The de Sitter group is assumed to go one step further, generalizing Poincar, as the group governing high-energy kinematics. In other words, ordinary special relativity is here replaced by de Sitter relativity. In this theory, the cosmological constant I > is no longer a free parameter, and can be determined in terms of other quantities. When applied to the whole universe, it is able to predict the value of I > and to explain the cosmic coincidence. When applied to the propagation of ultra-high energy photons, it gives a good estimate of the time delay observed in extragalactic gamma-ray flares. It can, for this reason, be considered a new paradigm to approach the quantum gravity problem.
- Foundations of Physics. New York: Springer, v. 39, n. 1, p. 1-19, 2009.
- de Sitter relativity
- Cosmological constant
- Quantum gravity
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