The number of particles per site is a crucial parameter in Fermionic DMRG calculations as it directly affects the accuracy of the results. In general, a larger number of particles per site will lead to more accurate results, but it also increases the computational cost and time required for the calculation.
The recommended range for the number of particles per site in Fermionic DMRG is typically between 1 and 4. This range balances the accuracy of the results with the computational cost, and it has been found to provide reliable results for a wide range of systems.
The number of particles per site can significantly impact the convergence of Fermionic DMRG calculations. In general, a larger number of particles per site will lead to slower convergence, as the Hilbert space grows exponentially with the number of particles. It is essential to carefully choose this parameter to ensure efficient convergence of the calculation.
Yes, it is possible to change the number of particles per site during a Fermionic DMRG calculation. This can be useful in cases where the initial guess for the number of particles per site was not optimal, or if the system being studied undergoes a phase transition that requires a different number of particles per site.
There are no specific guidelines for choosing the number of particles per site in Fermionic DMRG calculations for specific systems. However, it is recommended to perform convergence tests with different numbers of particles per site to determine the optimal value for a particular system. Additionally, the choice of this parameter may also depend on the physical properties of the system being studied.