# An inverse Bell theorem

1. Apr 23, 2015

### jk22

if we consider a separable measurement operator $$(A+A')\otimes (B-B')$$ then quantum mechanics predict the result is in [-2;2]

Whereas going to classical results would give in [-4;4]

This could indicate that going from measurement operator in the quantum realm to measurement results is maybe more complicated than just retranscripting the terms ?

2. Apr 24, 2015

### zonde

jk22, your post is not very coherent
Measurement operator represents measurements and in Bell test two measurement angles are always considered independent.
But measured pair of particles can be in separable or entangled state.

Classical results can't give such values for CHSH inequality. Correlation values in inequality are not just arbitrary numbers but maximum numbers you can get when using shared initial variable for particle pair.

3. May 6, 2015

### jk22

Well this operator is not Chsh but it shows a discrepancy between eigenvalues and the measurement results since the value of each operator A,A',B,B' is in {-1;1} whereas if i consider the operators like in a bell test they cannot reach such eigenvalues but not in general this is true my post is not very precise.

Last edited: May 6, 2015