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g orbitals (l=4) #11

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eimrek opened this issue Oct 10, 2023 · 0 comments
Open

g orbitals (l=4) #11

eimrek opened this issue Oct 10, 2023 · 0 comments

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@eimrek
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eimrek commented Oct 10, 2023

For some elements & basis sets, CP2K includes g orbitals (l=4). This needs to implemented here:

def _spherical_harmonic_grid(self, l, m, x_grid, y_grid, z_grid):
"""
Evaluates the spherical harmonics (times r^l) with some unknown normalization
(source: Carlo's Fortran code)
"""
c = (2.0/np.pi)**(3.0/4.0)
# s orbitals
if (l, m) == (0, 0):
return c
# p orbitals
elif (l, m) == (1, -1):
return c*2.0*y_grid
elif (l, m) == (1, 0):
return c*2.0*z_grid
elif (l, m) == (1, 1):
return c*2.0*x_grid
# d orbitals
elif (l, m) == (2, -2):
return c*4.0*x_grid*y_grid
elif (l, m) == (2, -1):
return c*4.0*y_grid*z_grid
elif (l, m) == (2, 0):
return c*2.0/np.sqrt(3)*(2*z_grid**2-x_grid**2-y_grid**2)
elif (l, m) == (2, 1):
return c*4.0*z_grid*x_grid
elif (l, m) == (2, 2):
return c*2.0*(x_grid**2-y_grid**2)
# f orbitals
elif (l, m) == (3, -3):
return c*np.sqrt(8/3)*y_grid*(3*x_grid**2-y_grid**2)
elif (l, m) == (3, -2):
return c*8.0*x_grid*y_grid*z_grid
elif (l, m) == (3, -1):
return c*np.sqrt(8/5)*y_grid*(4*z_grid**2-x_grid**2-y_grid**2)
elif (l, m) == (3, 0):
return c*4.0/np.sqrt(15.0)*z_grid*(2.0*z_grid**2-3.0*x_grid**2-3.0*y_grid**2)
elif (l, m) == (3, 1):
return c*np.sqrt(8/5)*x_grid*(4*z_grid**2-x_grid**2-y_grid**2)
elif (l, m) == (3, 2):
return c*4.0*z_grid*(x_grid**2-y_grid**2)
elif (l, m) == (3, 3):
return c*np.sqrt(8/3)*x_grid*(x_grid**2-3.0*y_grid**2)
print("No spherical harmonic found for l=%d, m=%d" % (l, m))
return 0

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