- #1
Ranku
- 434
- 18
Are virtual particles of the false vacuum during inflation indistinguishable from virtual particles of the true vacuum of the present universe?
Virtual Particles: Inflation vs Present Universe
- Context: Undergrad
- Thread starter Ranku
- Start date
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Discussion Overview
The discussion revolves around the nature of virtual particles in the context of the false vacuum during cosmic inflation compared to the true vacuum of the present universe. It explores theoretical implications, definitions, and the dynamics of vacuum fluctuations in different spacetime scenarios.
Discussion Character
- Debate/contested, Conceptual clarification, Technical explanation
Main Points Raised
- Some participants question whether virtual particles from the false vacuum during inflation are indistinguishable from those in the true vacuum of the present universe.
- One participant suggests that vacuum fluctuations are fundamentally similar in both inflating and non-inflating spacetimes, though their dynamics differ significantly during inflation due to the rapid expansion of space.
- A participant inquires about the possibility of virtual particles possessing inertial mass akin to real particles.
- Some participants assert that virtual particles are fictional constructs, referencing discussions from the quantum forum and suggesting a focus on vacuum fluctuations instead.
- There is a request for clarification on the concepts of false vacuum and true vacuum, indicating a need for deeper understanding among participants.
- A participant defines the false vacuum as a local minimum energy state that is not the lowest possible energy state, while the true vacuum is identified as the lowest energy state, noting uncertainty about the universe's current state.
Areas of Agreement / Disagreement
Participants express differing views on the existence and nature of virtual particles, with some asserting they are fictional while others find value in discussing vacuum fluctuations. The distinction between false and true vacuum is also a point of clarification rather than consensus.
Contextual Notes
There are unresolved assumptions regarding the definitions of vacuum states and the implications of vacuum fluctuations, as well as the nature of virtual particles in theoretical physics.
- #2
bapowell
Science Advisor
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Vacuum fluctuations are the same animal in inflating and non-inflating space times. Their dynamics, however, are very different during inflation on account of exponentially expanding space.
- #3
Ranku
- 434
- 18
Thank you for your reply. Can virtual particles be considered to have inertial mass just like real particles?
- #4
strangerep
Science Advisor
- 3,766
- 2,214
(All) virtual particles are fiction. (See various threads in the quantum forum, and also some recent insights.)
- #5
bapowell
Science Advisor
- 2,243
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Yes, but it does make sense to talk about vacuum fluctuations, particularly during inflation. I am trying to steer the OP in that direction.strangerep said:
- #6
Ssnow
Science Advisor
- 573
- 182
Hi, regarding
and
somebody know the difference? If yes is the answer, I am curious to know ...
Ranku said:
and
Ranku said:
somebody know the difference? If yes is the answer, I am curious to know ...
- #7
newjerseyrunner
- 1,532
- 637
A false vacuum is the local minimum, but not lowest energy state. A true vacuum is the lowest energy state, nobody knows if the universe is a true or false vacuum. This graph may help you.
- #8
Ssnow
Science Advisor
- 573
- 182
Thanks @newjerseyrunner, yes now is clear!
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