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Derivations of Bloch (Majorana--Bloch) equation, von Neumann equation, and Schr\"odinger--Pauli equation
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10 July 2024
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Abstract
The transition from classical physics to quantum mechanics has been mysterious. Here, we derive the space-independent von Neumann equation for electron spin mathematically from the classical Bloch or Majorana--Bloch equation, which is also derived. Subsequently, the space-independent Schr\"odinger--Pauli equation is derived in both the quantum mechanical and recently developed co-quantum dynamic frameworks.