...核 自旋算符,其定义如下: I x = σ x /2, I y = σ y /2, I z = σ z /2, (2.4) σ x 、σ y 、σ z 是泡利矩阵(Pauli matrices): σ x = 0 1 1 0 , σ y = 0 −i i 0 , σ z = 1 0 0 −1 .
abstract:In mathematical physics and mathematics, the Pauli matrices are a set of three 2 × 2 complex matrices which are Hermitian and unitary. Usually indicated by the Greek letter sigma (σ), they are occasionally denoted with a tau (τ) when used in connection with isospin symmetries.