Fauser - Treatise on Quantum Clifford Algebras.pdf
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arXiv:math.QA/0202059 v1 7 Feb 2002
A Treatise on
Quantum Clifford Algebras
Habilitationsschrift
Dr. Bertfried Fauser
Universit at Konstanz
Fachbereich Physik
Fach M 678
78457 Konstanz
January 25, 2002
To Dorothea Ida
and Rudolf Eugen Fauser
B
ERTFRIED
F
AUSER
— U
NIVERSITY OF
K
ONSTANZ
I
ABSTRACT:
Quantum Clifford Algebras (QCA), i.e. Clifford Hopf gebras based
on bilinear forms of arbitrary symmetry, are treated in a broad sense. Five al-
ternative constructions of QCAs are exhibited. Grade free Hopf gebraic product
formulas are derived for meet and join of Graßmann-Cayley algebras including
co-meet and co-join for Graßmann-Cayley co-gebras which are very efficient and
may be used in Robotics, left and right contractions, left and right co-contractions,
Clifford and co-Clifford products, etc. The Chevalley deformation, using a Clif-
ford map, arises as a special case. We discuss Hopf
algebra
versus Hopf
gebra
,
the latter emerging naturally from a bi-convolution. Antipode and crossing are
consequences of the product and co-product structure tensors and not subjectable
to a choice. A frequently used Kuperberg lemma is revisited necessitating the def-
inition of non-local products and interacting Hopf gebras which are generically
non-perturbative. A ‘spinorial’ generalization of the antipode is given. The non-
existence of non-trivial integrals in low-dimensional Clifford co-gebras is shown.
Generalized cliffordization is discussed which is based on non-exponentially gen-
erated bilinear forms in general resulting in non unital, non-associative products.
Reasonable assumptions lead to bilinear forms based on 2-cocycles. Cliffordiza-
tion is used to derive time- and normal-ordered generating functionals for the
Schwinger-Dyson hierarchies of non-linear spinor field theory and spinor electro-
dynamics. The relation between the vacuum structure, the operator ordering, and
the Hopf gebraic counit is discussed. QCAs are proposed as the natural language
for (fermionic) quantum field theory.
MSC2000:
16W30 Coalgebras, bialgebras, Hopf algebras;
15-02 Research exposition (monographs, survey articles);
15A66 Clifford algebras, spinors;
15A75 Exterior algebra, Grassmann algebra;
81T15 Perturbative methods of renormalization
Plik z chomika:
Mathematics2014
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