- #1
yuiop
- 3,962
- 20
Let us say we have a EPR type experiment using entangled electrons. If the two observers have their detectors orientated so that they make correlating detections, then as I understand it, if one observer makes positive detections of electrons with "up spin" then the other observer has to make positive detections with "down spin". For example if Alice tests for up spin and Bob tests for down spin, then the results should look something like this:
Alice: 10010111011010001100
Bob_: 10010111011010001100
where 1 represents a positive detection. Now if both Alice and Bob test for up spin the results should look something like this:
Alice: 10010111011010001100
Bob_: 01011001010010110110
Does that seem about right?
Now in a similar EPR experiment, but with entangled photons, does positive detection of photons with vertical polarisation by one observer correlate with positive detection of photons with horizontal polarisation by the other observer?
i.e if Alice test for vertical polarisation and Bob tests for horizontal polarisation the results should be something like this:
Alice: 10010111011010001100
Bob_: 10010111011010001100
but if they both test for vertical polarisation the results should look something like this:
Alice: 10010111011010001100
Bob_: 01011001010010110110
Is that correct? I am confused because some texts talk about correlating measurements agreeing when the polarisers have the same orientation and other texts say the positive correlations happen when the polarisers have opposite orientations. In other words, do entangled electrons have opposite spins and entangled photons have opposite polarisations?
Alice: 10010111011010001100
Bob_: 10010111011010001100
where 1 represents a positive detection. Now if both Alice and Bob test for up spin the results should look something like this:
Alice: 10010111011010001100
Bob_: 01011001010010110110
Does that seem about right?
Now in a similar EPR experiment, but with entangled photons, does positive detection of photons with vertical polarisation by one observer correlate with positive detection of photons with horizontal polarisation by the other observer?
i.e if Alice test for vertical polarisation and Bob tests for horizontal polarisation the results should be something like this:
Alice: 10010111011010001100
Bob_: 10010111011010001100
but if they both test for vertical polarisation the results should look something like this:
Alice: 10010111011010001100
Bob_: 01011001010010110110
Is that correct? I am confused because some texts talk about correlating measurements agreeing when the polarisers have the same orientation and other texts say the positive correlations happen when the polarisers have opposite orientations. In other words, do entangled electrons have opposite spins and entangled photons have opposite polarisations?