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Dirac fermion : ウィキペディア英語版
Dirac fermion

In physics, a Dirac fermion is a fermion which is not its own antiparticle. It is named for Paul Dirac. They can be modelled with the Dirac equation.
The alternative to a Dirac fermion is a Majorana fermion.
In particle physics, all fermions in the standard model, except possibly neutrinos, are Dirac fermions.
In condensed matter physics, low-energy excitations in graphene and topological insulators, among others, are fermionic quasiparticles described by a pseudo-relativistic Dirac equation.
==See also==

* Dirac spinor, a wavefunction-like description of a Dirac fermion
* Spinor, mathematical details
* Dirac sea, a conceptual metaphor

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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