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Dirac adjoint : ウィキペディア英語版 | Dirac adjoint In quantum field theory, the Dirac adjoint defines the dual operation of a Dirac spinor. The Dirac adjoint is motivated by the need to form well-behaved, measurable quantities out of Dirac spinors. Since the usual Hermitian adjoint lacks the Lorentz symmetry of the system, the Dirac adjoint must be used instead. Possibly to avoid confusion with the usual Hermitian adjoint, some textbooks do not provide a name for the Dirac adjoint but simply call it "ψ-bar". == Definition ==
Let ψ be a Dirac spinor. Then its Dirac adjoint is defined as : where ψ† denotes the Hermitian adjoint of the spinor ψ and γ0 is the time-like gamma matrix.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Dirac adjoint」の詳細全文を読む
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