Figure2b: Reconstructed density matrix of the 2 generated Bell states. 

Data are 4x4 matrices of complex numbers indexed as indicated below. The real part is shown in Figure2b of the main text. 
	 
Data row index (latex notation):
            $\uparrow_z \!  \uparrow_z $', '$\uparrow_z \downarrow_z $', '$\downarrow_z \! \uparrow_z $', '$\downarrow_z  \downarrow_z $'
Data column index:
	$\uparrow_z \!  \uparrow_z $', '$\uparrow_z \downarrow_z $', '$\downarrow_z \! \uparrow_z $', '$\downarrow_z  \downarrow_z $'