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The term Fermi point has two applications but refers to the same phenomena (special relativity):〔(Effective gravity and quantum field theory in superfluids )〕 *Fermi point (Quantum Field Theory) *Fermi point (Nanotechnology) For both applications count that the symmetry between particles and anti-particles in weak interactions is violated: At this point the particle energy E = cp is zero.〔(Field theory in superfluid 3He: What are the lessons for particle physics, gravity, and high-temperature superconductivity? )〕 In nanotechnology this concept can be applied to electron behavior.〔(METFET )〕 An electron when as single particle is a Fermion obeying the Pauli exclusion principle. ==Fermi point (Quantum Field Theory)== Fermionic systems that have a Fermi surface (FS) belong to a universality class in quantum field theory. Any collection of fermions with weak repulsive interactions belongs to this class. At the fermi point, the break of symmetry can be explained by assuming a vortex or singularity will appear as a result of the spin of a fermi particle (quasiparticle, Fermion) in one dimension of the three-dimensional momentum space.〔 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「Fermi point」の詳細全文を読む スポンサード リンク
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