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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
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