Berry Phase--what is the meaning of "*c" for BP term, and should it be zero?

[kcousins]

Hi all

I've read and reread papers and documentation, and combed this list (on which similar questions have been asked several times, but not, that I could find, answered).

My question: When doing Berry Phase calculations, my BP term always has non-zero values for the *c term which followed the BP term.

I think (correct or incorrect?) that this should be zero. I don't know how to make it zero, or if non-zero, how to incorporate the values into my BP calculation.

Thanks,
Kim

[admin]

this term refers to the indeterminacy of the BP term.