t-J model using HPhi?

[Shovan-Physics]

I was wondering if it is possible to simulate the t-J model using HPhi (without approximating by a large U in the Hubbard model). If this is implemented anywhere, I would appreciate if you can point me to the resource. Thanks.

[tmisawa]

The t-J model can be calculated by compiling the tJ branch code, which is currently under development. By specifying CalcModel 9 in calcmold.def, calculations for the t-J model with particle conservation and total Sz conservation can be performed. Additional options include:

CalcModel 10: Grand canonical t-J model
CalcModel 11: t-J model without Sz conservation

However, we found that the condition for excluding doublons does not work correctly for odd sites.
This issue is planned to be fixed later.
We confirmed that we can correctly calculate the t-J model with even sites.