On 11/4/2014 9:23 AM, Bruno Marchal wrote:
On 02 Nov 2014, at 19:09, meekerdb wrote:
On 11/2/2014 1:27 AM, Bruno Marchal wrote:
On 01 Nov 2014, at 23:52, meekerdb wrote:
Are you aware of the Paul-Pavicic "bomb" detector?
http://cds.cern.ch/record/395858/files/9908023.pdf
I did not know this. Impressive.
It is most easily thought of as non-local in time.
I will have to think about that. If you can elaborate. I think I intuit what you are
saying, but well, I need to work more on this.
Intuitively a photon is encouraged to enter the detector because it is in resonance
with an earlier instance of itself that is already circulating in the detector. The
experiment has not actually been done; but I think it would not work if you determined
the time of emission of the photon to a precision on the order of the circulation time
in the detector.
Is this based on some (relativistic?) account of the energy-time "uncertainty
relation"?
I must confess I have some difficulty to grasp your explanation but that might be due to
my incompetence.
More likely a misfire of my intuition. I base it on their analysis which just takes
classical analysis of a continuous EM wave of a single frequency (they note that a CW
laser can have a 300Km coherence length so this is a good approximation). So the solution
is an EM field which is constant in time, modulo the traveling phase. Then they interpret
this as a probability amplitude for a single photon. This implicitly makes the
probability amplitude for that single photon dependent on the wave that is assumed to be
time invariant. But then if you push the quantum viewpoint further, that classical wave
is just a probability amplitude for photons that came earlier.
Of course like most quantum weirdness the weirdness comes from assigning an interpretation
that explicitly splits the wave and particle pictures.
http://arxiv.org/pdf/1112.4522.pdf
Brent
Are not the chlorophyl molecule doing something similar when exploiting quantum
weirdness for optimizing the use of the photons? Can the plant "know" the precise time
of the absorption of the photons and get at the same time a similar energy optimum?
Plant would manage the energy of the sun without seeing, and without saying, of
course :)
I profit from not having read a paper on non-locality in time to speculate wildly, sorry
....
If you have a good link on this form of non locality... (and if I can optimize the
energy and time needed ...)
Bruno
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