Recent content by 0xDEAD BEEF

Thank you guys! This explain a lot of it. I have to think about all this for a while now! :) Cheers!

So if in "delayed quantum eraser experiment" we remove BSa and BSb will D0 always display interference pattern (even ignoring D1 and D2 data) or will there be some noise that now would be impossible to filter out due to lack of D3 and D4 input?

DrChinese - as my understanding is - entangled particles do produce interference pattern as long as both particles are not measured for '"which-path" information. I am referring to this video (and sorry for my naive approach) - As long as entangled particle hits BSc half-mirror (and it does...

Hi! :) I have this question regarding delayed choice quantum eraser - If my understanding is correct then interference pattern will form/not form based on whether there is erasing mirror in path of entangled particle - regardless of time when particle arrive at mirror. Should not it be...

Hi, imagine setup with source of entangled photons (A and B). Photon A travels to double slit so that either wave or particle pattern can be observed, photon B hits detector either before (setup 1) or after (setup 2) photon A has hit screen. Question: Will setup 1 show interference pattern...

What are key points how local-realism explains these experiments? No! My configuration was different. It was - Bob 0, Alisa 90. Photons flying in sometimes have angle 45, so they sometimes must hit ++, --, +-, -+, BUT, we only get +- and -+. BTW - thank you guys a lot! With every reply I...

Hmm. Ok, so i have "tuned" my program a bit and now i get more interesting results. Thought - i doubt that i have properly implemented photon physics in my program. So - as i now understand it - If those two photons would not be entangled twin-photons, then (for example), when Anna has her...

Very good! Now i really start to understand more! Thank you! :) BUUUT! :) But what I would like to say is, that - if normal photon has angle x, then chance of it hitting detector with angle y is determined by formula - (x < y + 45) && (x > y - 45), So should not it be so, that (simply)...

EDIT: So here is what I don't like about this proof. And with don't like i mean - i don't understand it. There are two entangled photons. Twin-photons. They are exactly same. Now Bob and Anna does some measurements on them. That is cool. And i can not disagree with output of those...

Because I want to understand, not to learn. (Edit: maybe also because i want to have chat with smart people... ;) ) Regarding relative angle between Bob and Alice - IN QM experiment increasing relative angle between Bob and Alice also increased mismatch rate. Same that would happen with...

DrChinese regarding - If Alice and Bob ARE entangled (PDC source), they will be 100% correlated. If Alice and Bob are NOT entangled (black box source), they will be about 75% correlated. But if i have blackbox, which outputs two photons (to Anna and Bob) having same polarization...

So you are saying, that after first measurement photons are not entangled any more. If so - does it matter at all that they were entangled from very beginning. Or maybe i am just getting this wrong, but - does entanglement gives any other extra properties to photons than just that they have...

So QM states, that particle can have only one "property" at time? For example - i send p (particle) through 0 angle polarizer. It goes either up or down and now it has its 0 angle property set to up or down. Then (p) travels through another polarizer, this time set at 90 angle, so particle now...

What is PDC source with with walkoff compensators? Yes - my black box device would be photon source which would output two photons to Anna and Bob. These two photons would have same polarization (photon a polarization == photon b polarization), but those polarizations would change on random...

Ha ha! (irony, but maybe not). So, how i see this- Anna got polarization filter and Bob has. Standart setup. What if we further extend this setup, so that Anna has 3 polarization filters all set at same angle. So, Anna would have 4 detectors. 2 for each "second" filter like this -...