Re: [ALPS-users] [help] How to compute the expectation value of 4 operators( two creation and two destruction operators)

Hello, Matthias,

Thanks! I am using Exact Diagonalization to calculate some bond-bond correlation. Will ALPS 2.0 support it?

Best, Jun

On Fri, Jun 25, 2010 at 11:17 PM, Matthias Troyer troyer@phys.ethz.chwrote:

Hi Jun,

This is not currently implemented but depending on which code you use it can be added.

Matthias

On 25 Jun 2010, at 09:59, Jun Wen wrote:

...

Hello all,

I have been trying to compute the expectation value of cdag(1) c(2) cdag(3) c(4) where two creation and two destruction

operators are involved and 1, 2 ,3 and 4 label the sites in a spinless Hubbard model. Could anyone kindly tell me how I should define this in the parameter file or in the models.xml?

...

Thanks a lot!

Best,

Jun