If virtual particles can appear, can real particles disappear?

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Discussion Overview

The discussion revolves around the concept of virtual particles and whether real particles can cease to exist temporarily without violating conservation of energy. Participants explore the implications of the uncertainty principle and related phenomena in quantum mechanics.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants propose that real particles could theoretically cease to exist briefly, questioning if this would violate conservation of energy.
  • One participant mentions that a photon can split into a virtual particle-antiparticle pair, suggesting this might be analogous to a particle 'disappearing'.
  • Another participant argues that quantum tunneling could be seen as an example of a real particle disappearing temporarily.
  • It is noted that a real particle can transform into an antiparticle pair, which then annihilates into energy before potentially becoming a particle again.

Areas of Agreement / Disagreement

Participants express differing views on whether real particles can disappear temporarily, with some suggesting mechanisms that might allow for this while others challenge the idea. The discussion remains unresolved with multiple competing perspectives.

Contextual Notes

Participants do not fully agree on the definitions and implications of virtual versus real particles, and the discussion includes assumptions about the nature of energy conservation and quantum processes.

jraj
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So virtual particles are allowed to exist so long as they 'give back' their energy in the time alloted by the uncertainty principle. This might be a fairly naive question, but it occurred to me that maybe the opposite is true. Can 'real' particles cease to exist for brief flashes of time without violating conservation of energy?

Is such an occurrence prohibited by any of the laws of physics?
 
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jraj said:
So virtual particles are allowed to exist so long as they 'give back' their energy in the time alloted by the uncertainty principle. This might be a fairly naive question, but it occurred to me that maybe the opposite is true. Can 'real' particles cease to exist for brief flashes of time without violating conservation of energy?
Is such an occurrence prohibited by any of the laws of physics?

Certainly. A photon splitting into a virtual particle-antiparticle pair and again being
'restored' is a common process that contributes to its propagation. You might say that it 'disappears'.
However, I don't think of 'virtual' particles more than a mere mnemonic.
 
It might be argued that quantum tunneling fits that description.
 
kinda. What happens is that a real particle transforms into an antiparticle pair, which then annihilates into energy, which then becomes a particle again.
 

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