Is Zero Point Energy a Fundamental Part of the Material Universe?

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The discussion centers on the nature of Zero Point Energy (ZPE) and its relationship to the material universe. Participants explore whether ZPE can be considered a medium through which particles move, likening it to an ether. The Casimir effect is highlighted as a key phenomenon illustrating the wave properties of photons and virtual particles in 'empty' space. There is acknowledgment of the challenges in quantifying the contributions of virtual particles due to the non-existence of true empty space. Overall, the conversation reflects on the complexities of quantum field theory and the conceptualization of spacetime filled with oscillating fields.
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I was wondering if my thought on Zero Point Field was correct. First of all is it part of the material universe?

Second, is it kind of like an ether or mediam through which things move through?
 
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The most notable property of ZPE is the casimir effect - a consequence of the wave properties of photons, and virtual particles popping in and out of existence in 'empty' space. Since empty space does not actually exist in our universe, the contributions of virtual particles to the casimir effect are difficult to quantify observationally.
 
redhedkangaro said:
I was wondering if my thought on Zero Point Field was correct. First of all is it part of the material universe?

Second, is it kind of like an ether or mediam through which things move through?

I guess nobody knows exactly. Quantum field theory is a theory based on analogy ,if you have an experience on the knowledge structure of some ancient means of medicine ,like chinese medicine,you should know what "analogy" means. in quantum mechanics, we have a microscopic structure at first ,and then quantize some quantity of the structure. But in quantum field theory we do not know what the microscopic stucture is. We don't know the lagrangain like the golden times that we "observe" the microscopic physics to deduce it.instead ,we guess it from the equation of motion,like dirac equation.
We just simpley imagined what spacetime with quantum fields should liik like, from analogy with continuous media dynamics ,that space is filled with tiny springs oscillates in the way that quantum mechanics already know. Exactly, we quantize certain fouries modes of the "wave" in this "media" , and the modes wave length can be arbitarily small, which in turns means that the tiny springs is coutinuous distributed in the space, in arbitarily small reagions you can always find tiny springs ascillates there ,and every one of them have the same amplitute of zero point energy. So the vacuum energy diverges, to have infinite value in any area of arbitary size, if you take into account every fourie mode.
 
https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
Why was the Hubble constant assumed to be decreasing and slowing down (decelerating) the expansion rate of the Universe, while at the same time Dark Energy is presumably accelerating the expansion? And to thicken the plot. recent news from NASA indicates that the Hubble constant is now increasing. Can you clarify this enigma? Also., if the Hubble constant eventually decreases, why is there a lower limit to its value?
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