Conservation laws and scattering for de Sitter classical particles

  title={Conservation laws and scattering for de Sitter classical particles},
  author={Sergio Luigi Cacciatori and Vittorio Gorini and Alexander Yu. Kamenshchik and U. Moschella},
  journal={Classical and Quantum Gravity},
Starting from an intrinsic geometric characterization of de Sitter timelike and lightlike geodesics we give a new description of the conserved quantities associated with classical free particles on the de Sitter manifold. These quantities allow for a natural discussion of classical pointlike scattering and decay processes. We also provide an intrinsic definition of the energy of a classical de Sitter particle and discuss its different expressions in various local coordinate systems and their… 

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    Modern Physics Letters A
  • 2019
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In this paper we will give a short introduction to the geometry of the de Sitter universe and describe an approach to de Sitter Quantum Field Theory based on the complexification of the de Sitter

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Restoration of spontaneously broken continuous symmetries in de Sitter spacetime.

  • Ratra
  • Mathematics
    Physical review. D, Particles and fields
  • 1985
It is shown that there is a natural initial condition, the requirement that the field energy remain finite as the scale factor a becomes small, which specifies a unique, time-dependent, de Sitter vacuum state.

Quantum field theory in de Sitter space: renormalization by point-splitting

  • T. S. BunchP. Davies
  • Physics, Computer Science
    Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences
  • 1978
A renormalization ansatz based on the DeWitt-Schwinger expansion is proposed, and it is shown that this removes all am biguities previously present in pointsplitting regularization.

de Sitter special relativity

A special relativity based on the de Sitter group is introduced, which is a theory that might hold up in the presence of a non-vanishing cosmological constant. Like ordinary special relativity, it