Recent content by Clovis

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    I Do Two Photons in a Radiative Cascade Exhibit Directional Correlation?

    Hi again, Anuttarasammyak. This question is much more complicated than I originally thought. Thank you very much for explaining it. I will think more about what you wrote.
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    I Do Two Photons in a Radiative Cascade Exhibit Directional Correlation?

    Discovered a math error in my analysis above. Please ignore for now.
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    I Do Two Photons in a Radiative Cascade Exhibit Directional Correlation?

    Hello anuttarasammyak and PeterDonis. I want to thank you both for making me think about my original posted question in more depth. After reviewing your comments I have analyzed, to the best of my abilities, the conservation of energy and conservation of momentum of the calcium atom emitting the...
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    I Do Two Photons in a Radiative Cascade Exhibit Directional Correlation?

    Hi again, Anuttarasammyak. Again, thank you. I see now that I made a mistake in the way I formulated my previous reply, so please ignore it.What I should have said is this: In your first reply, I believe that you concluded that p (the momentum of the calcium atom after emission of the two...
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    I Do Two Photons in a Radiative Cascade Exhibit Directional Correlation?

    Oops, my formatting test didn't work. Here is my reply with imperfect formatting. Apologies. Hello again, Anuttarasammyak. I very much appreciate you taking the time to consider my question in detail and write a thoughtful response. But I am having trouble understanding why the two equations...
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    I Do Two Photons in a Radiative Cascade Exhibit Directional Correlation?

    Allow me to test the formmatting before I post a reply: mc 2.
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    I Do Two Photons in a Radiative Cascade Exhibit Directional Correlation?

    Thank you, Anuttarasammyak. A similar thought had occurred to me at first but then I thought that the momentum of the system would still be conserved if, for example, both photons were emitted along the positive z-axis and the calcium atom recoiled along the negative z-axis. So it seems to me...
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    I Do Two Photons in a Radiative Cascade Exhibit Directional Correlation?

    Hello. I have a question about the two photons emitted from a radiative atomic cascade (such as the calcium radiative cascade used by Aspect et al. in their tests of Bell's theorem). The short version of my question is this: Do the two photons have any directional correlation (any correlation...
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    Entropy question: Does a substance at 0K have no entropy?

    Is it 0 K for a substance to have no entropy?Sorry. Just had to get that off my chest.
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    I Did Einstein Formulate an Aberration of Light Using Tangents?

    Thank you, Sienna. The reason for my question was merely to give proper credit for the tangent equation in a website that I am working on. But I appreciate your reply, all the same. Clovis
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    I Did Einstein Formulate an Aberration of Light Using Tangents?

    Hello, everyone. I am trying to find an aberration of light formula in Einstein's writings that is given in terms of tangents. I did a fairly thorough internet search and all I could find was the formula he wrote in terms of cosines. Yet I have a vague memory that somewhere he did give the...
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    Question about spontaneous parametric down conversion

    Thank you both, Naima and Dr. Chinese. I think what I didn't understand before your responses is that there are sub-categories of entanglement. Particles can be entangled in some of their properties but not in others. For example, in the Wikipedia figure I referred to in my first posting, the...
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    Question about spontaneous parametric down conversion

    Thank you very much, Naima, for a very clear reply. It helped my understanding quite a bit. I am pretty sure I understand the example you gave of non-entanglement in your last paragraph. I can see that if the particles come from two sources then they are not entangled. But if they come from the...
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    Question about spontaneous parametric down conversion

    I would like some help understanding some parts of spontaneous parametric down conversion (SPDC).In the Wikipedia article on the topic…http://en.wikipedia.org/wiki/Spontaneous_parametric_down-conversion…the third figure from the top is labeled “An SPDC scheme with the Type II output”. The figure...
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    What is the Bipolar coordinate system used for in the DSM manual?

    I was searching the internet for information on Bell tests, when I found an article entitled "Taco Bell tests grilled stuffed nacho." Does anyone know how the stuffed nachos are used in Bell tests? http://www.huffingtonpost.com/2013/10/11/taco-bell-grilled-stuft-nacho_n_4086345.html...
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