Re: Entropy classical only?

On Mar 14, 9:59 pm, Ben Rudiak-Gould <br276delet...@xxxxxxxxx> wrote:
PD wrote:
Consider Wheeler's galactic delayed choice experiment, where light
from a quasar is lensed gravitationally around an intervening galaxy
so that photons arrive at a common detection point. The delayed choice
is made well after billions of years of light-travel. Lowering h
reduces the energy content of each photon but doesn't do anything to
change the outcome of the delayed choice experiment, as far as I can
tell.

Well, it depends on how you take the limit. If you keep the wavelength
constant, then the per-photon energy goes to zero, so you can't see single
photons any more, and you get behavior consistent with classical wave optics
even if you use the directional detectors. If you keep the per-photon energy
constant, then the wavelength goes to zero, so you can't see the
interference fringes any more, and you get behavior consistent with
classical corpuscles even if you use the photographic plate. Your delayed
choice only has observable consequences if the per-photon energy and the
wavelength are both detectably large, which implies a reasonably large value
of h.

-- Ben

Ben ... I agree that QED it´s no more linear ...

galathea ... the cat map come back to the original state after some
period in time evolution ... so there
is no entrophy time direction after all ... but as I say before ... I
don´t know almost nothing about quantum chaos ...
so I only try to share my opinion from my ignorance ...

best regards

juan

.

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