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Quantum fluctuations at different height.

  1. Oct 1, 2011 #1


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    has quantum fluctuations and the Wand der walls force that they produce been measured at different heights? Are there any results? Would there/ should there, according to accepted theories, be any difference?
  2. jcsd
  3. Oct 1, 2011 #2


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    You mean gravity? No, the Van der Waals attraction is one of the fundamental forces that hold atoms together to form molecules. If it varied with height it would have a very noticeable effect on the properties of all substances.

    For a pair of hydrogen atoms, for example, the Van der Waals potential can easily be calculated using time-independent second order perturbation theory as ce2a05/R6 where R is the distance between the pair of atoms, a0 is the Bohr radius, and c is a small numerical constant, about 6.5.
  4. Oct 2, 2011 #3


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    Different heights/ different intensity gravitational fields, yes.
    The idea for this question was like this: we know of Einsteins missing inch, the inch missing in Earths circumference due to stretching of space and so. This means that there is actually more space near a gravitating body than.. further away, in a weaker relative gravitational field. A very tiny bit, but still, it is. [ looking from a higher plain/ dimension, if you will]
    If there is more space, then there should be relatively more quantum fluctuations, no?[looking from a higher plain]
    ok, I saw my flaw in thought here - we cannot possibly detect any difference in space density, because we are a part of it and morf with it as it goes..
    but still... so what are quantum fluctuations anyway?
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