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* [[#]]
 
* [[#]]
* quadratic space <math>(V,Q)</math>
 
* Q : non-degenerate quadratic form, defines a symmetric bilinear form <math><x,y></math>
 
*  Clifford algebra : associative algebra generated by vectors in V with relations<br>
 
** <math>v^2=Q(v)</math>
 
** <math>vw+wv=2<w,v></math>
 
 
* Clifford algebras may be thought of as quantizations (cf. quantization (physics), Quantum group) of the exterior algebra, in the same way that the [[Weyl algebra]] is a quantization of the symmetric algebra.
 
* Clifford algebras may be thought of as quantizations (cf. quantization (physics), Quantum group) of the exterior algebra, in the same way that the [[Weyl algebra]] is a quantization of the symmetric algebra.
  

2012년 3월 5일 (월) 10:37 판

introduction
  • #
  • Clifford algebras may be thought of as quantizations (cf. quantization (physics), Quantum group) of the exterior algebra, in the same way that the Weyl algebra is a quantization of the symmetric algebra.

 

 

spinor
  • consider a representation of Clifford algebras
  • the elements in this space are called spinors
  • Spinors are classified according to Dirac, Weyl, Majorana and Weyl-Majorana spinors.
  • applications
    • spinor bundles
    • spin connections
    • the role of spinors in the description of the fundamental interactions between elementary particles

 

 

Pauli spinor
  • 8-dimensional real algebra
  • isomorphic to C(E_{3}) Clifford algebra of the Euclidean space E_{3}

 

 

Dirac matrices
  • 16 dimensional real algebra
  • isomorphic to C(E_{3,1}) Clifford algebra of the Minkowski space E_{3,1}
  • \(\gamma_{\mu}^2=\epsilon_{\mu}\), \(\gamma_{\mu}\gamma_{\nu}+\gamma_{\nu}\gamma_{\mu}=0\)\(\epsilon_{0}=1, \epsilon_{i}=-1\)
  • there exists unique four dimensional representation of a Clifford algebra
  • projective representation of the Lorentz group
  • universal covering of the Lorentz group H=SL(2,\mathbb{C}) also acts on it

 

 

history

 

 

related items

 

 

encyclopedia

 

 

books

 

 

 

expositions
  • Frescura, F. A. M. 1981. “Geometric interpretation of the Pauli spinor”. American Journal of Physics 49: 152. doi:10.1119/1.12548.
  • Vivarelli, Maria Dina. 1984. “Development of spinor descriptions of rotational mechanics from Euler’s rigid body displacement theorem”. Celestial Mechanics 32 (3월): 193-207. doi:10.1007/BF01236599.
  • Coquereaux, Robert. 2005. “Clifford algebras, spinors and fundamental interactions : Twenty Years After”. arXiv:math-ph/0509040 (9월 19). http://arxiv.org/abs/math-ph/0509040.

 

 

articles

 

 

 

question and answers(Math Overflow)

 

 

 

blogs

 

 

experts on the field

 

 

links