Pauli spin matrices

Pauli spin matrices

[′pȯl·ē ′spin ‚mā·trə·sēz]
(quantum mechanics)
Three anticommuting matrices, each having two rows and two columns, which represent the components of the electron spin operator:
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is the Pauli 2x2 vector matrix derived from the three 2x2 Pauli spin matrices [[sigma].
In modern usage, biquaternions are classified as one of the Clifford algebras, and are isomorphic to the algebra of (2x2 complex-valued) Pauli spin matrices.