The Effect of Uncertainty Principle on the Thermodynamics of Early Universe

Details The Effect of Uncertainty Principle on the Thermodynamics of Early Universe The Effect of Uncertainty Principle on the Thermodynamics of Early Universe

2005-08-15

arxiv.org/abs/astro-ph/0508322v1

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures

Scientific paper

We discuss the concept of measurement in cosmology from the relativistic and quantum mechanical points of view. The uncertainty principle within the particle horizon, excludes the momentum of particles to be less than $\pi\hbar H/c$. This effect modifies the standard thermodynamics of early universe for the ultra-relativistic particles such that the equation of state as well as dependence of energy density and pressure to the temperature. We show that this modification to the thermodynamics of early universe is important for energies $E>10^{17} GeV$. During the inflation, the particle horizon inflates to a huge size and makes the uncertainty in the momentum to be negligible.

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