Hi Francisco,

On Dec 29, 2012, at 11:32 PM, Francisco Cordobés <ghiret@gmail.com> wrote:

> Hello,
>
> I was wondering what is the definition that that the loop and directed loop code return when the options:
>
> 'MEASURE[Correlations]'     : True,

The Sz correlation function for spin models and the density correlation function for bosonic models.

> 'MEASURE[Structure Factor]' : True,

The Fourier transform of above.

>  'MEASURE[Green Function]'   : True,

The S+ -- S- correlation function for spin models and b^\dag -- b correlation function for bosonic models.

Best regards

Matthias Troyer

>
> Because I haven't been able to find them and I would like to know what they are and more importantly what prefactors it has or it hasn't.
>
> Thank you very much,
> Francisco Cordobes