Hello Dear ALPs users

I have 2 questions.I am novice in ALPS.

1- I want to calculate correlation function for coupled ladders. my input file is  attached

in the output file, there are 4  values of correlation function for nearest neighbors. this is part of output file

Spin Correlations[( 0,0 ) -- ( 0,1 )]

Spin Correlations[( 0,0 ) -- ( 0,1 )]

Spin Correlations[( 0,0 ) -- ( 0,1 )]

Spin Correlations[( 0,0 ) -- ( 0,1 )]

-whereas i expect there is one of them or at least 3 of them (x-y-z), is there a bug in the input file or something else?

2- How do I define an alternating chain? (my mean is alternating coupling constants)

Best Regards