Virtuals particles, vacuum and infinite energy

In summary, virtual particles are transient fluctuations that occur in a vacuum, challenging the classical notion of empty space. They arise from quantum field theory, where energy can spontaneously appear and vanish, leading to the concept of vacuum energy. This phenomenon suggests that the vacuum is not truly empty but teems with potential energy, which could have implications for understanding the universe's energy dynamics and possibly tapping into infinite energy sources.
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Donut
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Hi guys I have a question for you. Virtual particles can appear anywhere and when they have enough energy they turn into real. And if it happens long enough in a vacuum, will it remain a vacuum? If not, then is matter infinite?
 
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Donut said:
Hi guys I have a question for you. Virtual particles can appear anywhere and when they have enough energy they turn into real.
No, they don't
Donut said:
And if it happens long enough in a vacuum, will it remain a vacuum?
Since it doesn't happen that question makes no sense
Donut said:
If not, then is matter infinite?
If the universe is infinite, then matter is infinite, but not having anything to do with virtual particles

https://www.physicsforums.com/insights/misconceptions-virtual-particles/
https://www.physicsforums.com/insights/physics-virtual-particles/
 
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  • #3
Donut said:
Virtual particles can appear anywhere and when they have enough energy they turn into real.
Please post reference links when making assertions like this at PF. Please make sure that the references are to credible scientific articles and not "Pop-Sci" articles. Thanks.
 
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  • #4
phinds said:
No, they don't

In the Casimir effect, a force is actually measured between the two metallic plates. This was physically interpreted based on quantum vacuum fluctuations. By removing wavelength beyond a threshold the virtual particles allowed energy is constrained between the plates. Thus the observed pressure in the Casimir effect, would come from a lower vacuum energy density between the plates than outside.

Now the question is the following: if the Casimir force is real, then it could generate some work at maximum dW=F*dl (l is the distance between plates). So, can you elaborate on the fact that vacuum energy cannot be real.
 
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The Insights article links in post #5 are a sufficient response. Thread closed.
 
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FAQ: Virtuals particles, vacuum and infinite energy

What are virtual particles?

Virtual particles are temporary fluctuations that occur in quantum fields. They are not directly observable but are used in quantum field theory to explain interactions between particles. These particles exist for a very short time and cannot be detected directly, but their effects can be measured, such as in the forces between particles.

How do virtual particles relate to the vacuum state?

The vacuum state in quantum field theory is not empty but is filled with fluctuating fields and virtual particles. These virtual particles pop in and out of existence, contributing to phenomena such as the Casimir effect, where two uncharged metal plates placed close together in a vacuum experience an attractive force due to these fluctuations.

Is it possible to extract infinite energy from the vacuum using virtual particles?

No, it is not possible to extract infinite energy from the vacuum. While the vacuum does have a non-zero energy density due to virtual particles, this energy is not accessible for practical use. Attempts to extract energy from the vacuum would violate the laws of thermodynamics and conservation of energy.

What role do virtual particles play in particle interactions?

Virtual particles mediate forces between real particles. For example, in quantum electrodynamics, the electromagnetic force between two charged particles is described by the exchange of virtual photons. These virtual particles facilitate interactions without being directly observed themselves.

Can virtual particles become real particles?

Under certain conditions, virtual particles can become real particles. This can happen in high-energy environments, such as near black holes or in particle accelerators. For instance, the Hawking radiation near black holes involves virtual particles becoming real, leading to the emission of radiation from the black hole.

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