SPIN MATRIX EXPONENTIALS AND TRANSMISSION MATRICES
The three Pauli spin matrices sigma /sub i/ (i = 1, 2, 3) occur in the mechanical, especially quantum mechanical, theory of rotation in three- dimensional space. The three spin matrix exponentials are defined as exp ( sigma /sub i/, x), where x is the independent variable. Transmission matrices can be expressed in terms of spin matrix exponentials, thereby permitting a more systematic treatment of transmission line circuits. (auth)