Statistical Effect of Interactions on Particle Creation in Expanding Universe
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概要
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The statistical effect of interactions which drives many-particle systems toward equilibrium is expected to change the qualitative and quantitative features of particle creation in expanding universe. to investigate this problem a simplified model called the finite-time reduction model is formulated and applied to the scalar particle creation in the radiation dominant Friedmann universe. The number density of created particles and the entropy production due to particle creation are estimated. The result for the number density is compared with that in the conventional free field theory. It is shown that the statistical effect increases the particle creation and lengthens the active creation period. As for the entropy production it is shown that is is negligible for scalar particles in the Friedmann universe.
- 理論物理学刊行会の論文
- 1982-05-25
著者
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Kodama Hideo
Department Of Particle And Nuclear Physics Graduate University For Advanced Studies:theory Center Ke
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KODAMA Hideo
Department of Particle and Nuclear Physics, Graduate University for Advanced Studies:Theory Center, KEK
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