qimpy.math.spherical_harmonics.get_harmonics_tilde_and_prime

get_harmonics_tilde_and_prime(l_max, G, compute_prime=True)

Same as get_harmonics_and_prime(), but in reciprocal space. The result contains an extra phase of \((iG)^l\), as discussed in get_harmonics_tilde.

Parameters:

• l_max (int)

• G (Tensor)

Return type:

tuple[Tensor, Tensor]