I don't know what that is but it sounds like an advanced research tool that would cost a lot of money
I think it's in the ballpark of the price of a new turbo encabulator.
Depends on what you consider reasonable. If you're a researcher, Thorlabs has a couple for <$30k. You could also build your own, but you probably wouldn't be asking if you had the experience necessary to do this.
If you're a hobbyist, building your own would be an impressive project that would teach you a lot (look up spontaneous parametric down-conversion, a common way to create entangled pairs). It would also be pricey, as you would need an appropriate laser source (probably a nanosecond pulsed laser), a non-linear crystal like BBO, and a lot of miscellaneous optical components, etc. You can get this stuff second hand online for a lot cheaper than new, but it would still cost a lot for an individual. You would also need to characterize your output to ensure you're actually getting correlated pairs, which is outside of my expertise.
Does Thorlabs still package random snacks in their orders? Some lab snacks would offset the sting of a $30k pricetag by a tiny bit.
They do lol
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