Vacuum Energy - Pair Production Confusion

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Discussion Overview

The discussion revolves around the concept of vacuum energy and pair production, particularly in the context of black hole evaporation and the nature of virtual particles. Participants explore theoretical implications, the behavior of particles near event horizons, and the relationship between energy and mass in quantum field theory.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants express confusion about the nature of particles produced during vacuum fluctuations, questioning whether they can have negative mass and how this relates to black hole evaporation.
  • There is a discussion about the local versus global energy in general relativity, with some suggesting that while both particles in a pair locally carry positive energy, one may appear to have negative energy at infinity.
  • Participants debate the significance of virtual particles, with some arguing they are merely artifacts of quantum field theory calculations, while others assert their importance in high-energy physics and phenomena like the Casimir effect.
  • Questions arise regarding what virtual particles annihilate into and whether any energy is produced from their annihilation, with differing views on whether this results in a net energy change.
  • Some participants reference Einstein's equation E=mc² in relation to the energy-mass conversion during pair production, seeking clarification and support for this idea.

Areas of Agreement / Disagreement

Participants do not reach consensus on several key points, including the nature of virtual particles, the implications of energy conservation during annihilation, and the interpretation of energy and mass in the context of vacuum fluctuations. Multiple competing views remain throughout the discussion.

Contextual Notes

Participants acknowledge the complexity of the topic, with references to the uncertainty principle, the effects of gravitational fields, and the nuances of energy definitions in different contexts. Some assumptions about the behavior of particles and energy conservation are not fully resolved.

Who May Find This Useful

This discussion may be of interest to those studying quantum mechanics, general relativity, or theoretical physics, particularly in relation to black holes and vacuum energy phenomena.

  • #31
malawi_glenn said:
...
Well this may be confusing. The definition of the vacuum to start with is the state with the lowest possible energy, and only energy differences matter : at this point with do not need perturbative methods. I think it is worth emphasizing before embarking into perturbative calculations of the energy of the fluctuations.
 
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  • #32
humanino said:
Well this may be confusing. The definition of the vacuum to start with is the state with the lowest possible energy, and only energy differences matter : at this point with do not need perturbative methods. I think it is worth emphasizing before embarking into perturbative calculations of the energy of the fluctuations.

I actually wrote something similar yesterday.. I thought it was in this particular thread.. that is why I wrote about perturbation calculations in my latest posts.. doh, I must get my memory back :D
 

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