Gravitation, C, P and T symmetries and the Second Law - AstrophysicsReportar como inadecuado

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Abstract: The intimate links between gravitation and the second law are summarized andtwo less known relations between gravity and thermodynamics are studied.Firstly, the information cost required to operate a Maxwell-s demon on a curvedspacetime is estimated using the Kolmogorov-Sinai entropy. More importantly,the charge and time C and T reversal properties of the Kerr-Newman solutionin General relativity show that this solution, similarly to the Dirac equation,appears to represent both a particle and its antiparticle and suggests adefinition of antimatter in general relativity. This definition leads to aparameter free explanation of the cosmological constant term observed in thesupernovae data. The relation of this definition of antimatter with the coupledsystems through opposite time arrows studied by Schulman is also emphasized.

Autor: G. Chardin


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