im just curious and i just want to know, do you need a barium borate crystal to entangle photons? are there any alternatives? can you use sodium chloride crystals as a possible option? what makes a barium borate so special and different from any other crystals? please provide good info and please no negative comments. thank you
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BBO
http://www.coherent.com/downloads/BBO_DS…
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Material Safety Data Sheet: Na Cl
http://www.2spi.com/catalog/msds/msds018…
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The reason that barium crystals work to create entangled photons and Na Cl doesn't, probably has to do with crystal purity and photon activation level, among other things. What ever crystal used, it must be photonic and highly nonlinear -- in molecular structure, I suspect.
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I'm not too sure of the exact details but some times and atom can be excited into emitting two photons in opposite directions that are entangled.
See: Why did we elaborate an entangled photons experiment in our engineering school
http://spie.org/etop/ETOP2005_006.pdf
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(".... Kocher and Commins had used the atomic cascade method for producing their correlated photons, and CHSH concurred that this was the right method for their own experiment. Here an atom is excited and emits two photons as it decays two levels down; and the two photons are entangled. The source of the photons was a beam of calcium atoms emanating from a hot oven. The atom in the beam were bombarded by strong ultraviolet radiation. As a response to this radiation, electrons in the calcium atoms were exited to higher levels, and when they descended again, they released pairs of correlated photons. ....")
En __ tanglement: The Greatest Mystery In Physics
by Amir D. Aczel
ISBN: 1-56858-232-3
page 166
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There are likely to be many ways to create photon entanglement and other subatomic particle entanglement as well. I have heard is said that whole molecules have been successfully entangled.
http://www.coherent.com/downloads/BBO_DS…
---------------
Material Safety Data Sheet: Na Cl
http://www.2spi.com/catalog/msds/msds018…
----------------
The reason that barium crystals work to create entangled photons and Na Cl doesn't, probably has to do with crystal purity and photon activation level, among other things. What ever crystal used, it must be photonic and highly nonlinear -- in molecular structure, I suspect.
----------------
I'm not too sure of the exact details but some times and atom can be excited into emitting two photons in opposite directions that are entangled.
See: Why did we elaborate an entangled photons experiment in our engineering school
http://spie.org/etop/ETOP2005_006.pdf
-----------------
(".... Kocher and Commins had used the atomic cascade method for producing their correlated photons, and CHSH concurred that this was the right method for their own experiment. Here an atom is excited and emits two photons as it decays two levels down; and the two photons are entangled. The source of the photons was a beam of calcium atoms emanating from a hot oven. The atom in the beam were bombarded by strong ultraviolet radiation. As a response to this radiation, electrons in the calcium atoms were exited to higher levels, and when they descended again, they released pairs of correlated photons. ....")
En __ tanglement: The Greatest Mystery In Physics
by Amir D. Aczel
ISBN: 1-56858-232-3
page 166
----------------------------
There are likely to be many ways to create photon entanglement and other subatomic particle entanglement as well. I have heard is said that whole molecules have been successfully entangled.