Conformal Symmetry and Cosmological Entropy Production
AbstractIntroducing an effective refraction index of an isotropic cosmic medium, we investigate the cosmological fluid dynamics which is consistent with a conformal, timelike symmetry of a corresponding "optical" metric. We demonstrate that this kind of symmetry is compatible with the existence of a negative viscous pressure and, consequently, with cosmological entropy production. We establish an exactly solvable model according to which the viscous pressure is a consequence of a self-interacting one-particle force which is self-consistently exerted on the microscopic particles of a relativistic gas. Furthermore, we show that a suficiently high decay rate of the refraction index of an ultrarelativistic cosmic medium results in an in ationary expansion of the universe.
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Zimdahl, W.; Balakin, A.B. Conformal Symmetry and Cosmological Entropy Production. Entropy 2002, 4, 49-64.
Zimdahl W, Balakin AB. Conformal Symmetry and Cosmological Entropy Production. Entropy. 2002; 4(3):49-64.Chicago/Turabian Style
Zimdahl, Winfried; Balakin, Alexander B. 2002. "Conformal Symmetry and Cosmological Entropy Production." Entropy 4, no. 3: 49-64.