SLD
Contributor
OK, still plowing through a book on group theory and running up against another problem.
SU(N) matrices are NxN matrices that are both unitary and have determinant = 1. Unitary means that if you multiply the matrix by its complex conjugate transposed, then you get the identity matrix. Fairly simple. I understand all that. Made a few examples myself and played with them for fun.
Then the book brings up the Gell-Mann matrices. And that is where I'm lost. Not a single one has a determinant equal to 1. Nor do you get I if you multiply them by their Hermitian conjugate.
https://en.wikipedia.org/wiki/Gell-Mann_matrices
Obviously I am missing something basic. The Gell-Mann matrices are not SU(3), but then do they just help generate the proper SU(3) matrices through linear combination? Or what? Just confused at this point in the book.
TIA
SLD
SU(N) matrices are NxN matrices that are both unitary and have determinant = 1. Unitary means that if you multiply the matrix by its complex conjugate transposed, then you get the identity matrix. Fairly simple. I understand all that. Made a few examples myself and played with them for fun.
Then the book brings up the Gell-Mann matrices. And that is where I'm lost. Not a single one has a determinant equal to 1. Nor do you get I if you multiply them by their Hermitian conjugate.
https://en.wikipedia.org/wiki/Gell-Mann_matrices
Obviously I am missing something basic. The Gell-Mann matrices are not SU(3), but then do they just help generate the proper SU(3) matrices through linear combination? Or what? Just confused at this point in the book.
TIA
SLD