# Bogoliubov deGennes Equation

1. Oct 21, 2009

### ayankhan

Dear Colleagues,
My work is related to the diagonalisation of Bogoliubov deGennes (BDG) equation.
But numerically it is becomming very tough when I go beyond 51$$\times$$ 51 grid.
I am working in fortran90 and using lapack subroutine (zheevx) for diagonalisation. The matrix is not sparse.
regards
ayan

2. Oct 21, 2009

### olgranpappy

and what is your question? ;P

oh, okay, the question is implied. So, how big is the matrix you are diagonalizing?

3. Oct 21, 2009

### ayankhan

I want to resolve the hamiltonian in 101\times101 grid. which means the BDG matrix will be of 202\times202.
regards
ayan

4. Oct 21, 2009

### olgranpappy

That's not very big... What seems to be the problem? In fact this is small enough that you should be able to do it with Mathematica very quickly I think.