Dear ~~~ Recently I prepare use DMRG to perform calculations. And I find alps a very useful tool, but I have the following questions about its use: 1, How to define the model. I search the webpage of alps and don't find the materials. I study a ladder with nearest neighbor and next nearest neighbor hoppings. How do I define the lattice and how do I give the parameters?

2, I will calculate the physical quantity as a function of a parameter. How to do this?

3, I want to calculate some physical quantities, such as the n(k) (particle distribution in the momentum space), the current on a bond. How do I do these calculations? Can I write the related programs based on alps?

Thank you very much! Huaiming Beihang University, Beijing