Commit 6ba27a9d authored by Jefferson Stafusa E. Portela's avatar Jefferson Stafusa E. Portela
Browse files

Improved question 2b of part 2; questions about complementing it.

parent 5326bf4f
......@@ -322,7 +322,7 @@ Enddo
\end{itemize}
Note: If you'd like to run the simulation using MPI, you should also add the broadcasting call for \texttt{Ham\_Ty} to \texttt{Ham\_Set}. It is a good idea as well to include the new variable to the simulation parameters written into the file \texttt{info}, also in \texttt{Ham\_Set}.
In the directory \texttt{Solutions/Exercise\_1} we have duplicated ALF's code and commented the changes that have to be carried out to the file \texttt{Hamiltonian\_Hubbard\_Plain\_Vanilla\_mod.F90} in the \texttt{Prog} directory. The solution directory also includes reference data and the necessary \texttt{Start} directory (remember to copy its contents to every new \texttt{Run} directory, and to have a different \texttt{Run} directory for each simulationi).
In the directory \texttt{Solutions/Exercise\_1} we have duplicated ALF's code and commented the changes that have to be carried out to the file \texttt{Hamiltonian\_Hubbard\_Plain\_Vanilla\_mod.F90} in the \texttt{Prog} directory. The solution directory also includes reference data and the necessary \texttt{Start} directory (remember to copy its contents to every new \texttt{Run} directory, and to have a different \texttt{Run} directory for each simulation).
\noindent
As an application of this code, we can consider a 2-leg ladder system defined, e.g., with \texttt{L1=14}, \texttt{L2=2}, \texttt{Lattice\_type="Square"}, \texttt{Model="Hubbard\_Plain\_Vanilla"} and different values of \texttt{Ham\_Ty}. The results you should obtain are summarized in Fig.~\ref{fig:ladder}.
......@@ -339,7 +339,9 @@ As an application of this code, we can consider a 2-leg ladder system defined, e
\exerciseitem{The SU(2) Hubbard-Stratonovich transformation}
The SU(2) Hubbard-Stratonovich decomposition conserves spin rotational symmetry. Introduce into \texttt{Hamiltonian\_Hubbard\_mod.F90} the same changes done to the \texttt{Vanilla} module, described in the previous item, and compare results.
The SU(2) Hubbard-Stratonovich decomposition conserves spin rotational symmetry. Introduce into the moduel \texttt{Hamiltonian\_Hubbard\_mod.F90} and into the name space \texttt{VAR\_Hubbard} the same changes done to the \texttt{Vanilla} module, described in the previous item, and enter \texttt{Mz=.F.} in the \texttt{parameters} file (to choose the $SU(N)$ Hubbard interaction) and compare results.
\red{[Should we state the expected result? Should we also provide a solution directory as done for the item (a)?]}
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