Pauli vector

Noun

• A vector whose components are Pauli matrices; e.g., $\backslash vec\; \backslash sigma\; =\; \backslash sigma\_1\; \backslash hat\; i\; +\; \backslash sigma\_2\; \backslash hat\; j\; +\; \backslash sigma\_3\; \backslash hat\; k$.