Matter pressure and vacuum pressure

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SUMMARY

To calculate when matter pressure and vacuum pressure sum to zero in the universe's evolution, one must analyze their functions over time. The discussion emphasizes using the Weinberg and Kolb & Turner textbooks as primary resources for understanding the relevant equations. Participants recommend calculating both pressures as functions of time and equating them, focusing on obtaining accurate values from the early universe. Key constants and parameters from cosmology are essential for these calculations.

PREREQUISITES
  • Understanding of cosmological principles and equations
  • Familiarity with the concepts of matter pressure and vacuum pressure
  • Knowledge of the Weinberg textbook on cosmology
  • Basic proficiency in mathematical modeling of physical systems
NEXT STEPS
  • Study the equations presented in the Weinberg textbook on cosmology
  • Review Kolb & Turner's "The Early Universe" for relevant calculations
  • Research the current values of cosmological parameters for accurate modeling
  • Practice solving equations involving matter and vacuum pressure dynamics
USEFUL FOR

Students preparing for exams in gravitation and cosmology, researchers in theoretical physics, and anyone interested in the dynamics of the universe's expansion.

roopace
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how do I calculate the time when matter pressure and vacuum pressure add to 0 in the evolution of the universe. I have an exam of gravitation and cosmology coming Monday but have no clue where to start from. I can find nothing on weinberg and kolb and Turner textbooks
 
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Calculate both as a function of time, set them equal (apart from their sign). You'll need some values of the current or earlier universe to start with. Which numbers can you use?
 

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