Representations of the braid group B_n and the highest weight modules of U(sl_{n-1}) and U_q(sl_{n-1})

Details Representations of the braid group B_n and the highest weight modules of U(sl_{n-1}) and U_q(sl_{n-1}) Representations of the braid group B_n and the highest weight modules of U(sl_{n-1}) and U_q(sl_{n-1})

2008-03-19

arxiv.org/abs/0803.2785v2

Mathematics

Quantum Algebra

18 pages

Scientific paper

In [1] we have constructed a [n+1/2]+1 parameters family of irreducible representations of the Braid group B_3 in arbitrary dimension using a $q-$deformation of the Pascal triangle. This construction extends in particular results by S.P. Humphries (2000), who constructed representations of the braid group B_3 in arbitrary dimension using the classical Pascal triangle. E. Ferrand (2000) obtained an equivalent representation of B_3 by considering two special operators in the space ${\mathbb C}^n[X].$ Slightly more general representations were given by I. Tuba and H. Wenzl (2001). They involve [n+1/2] parameters (and also use the classical Pascal's triangle). The latter authors also gave the complete classification of all simple representations of $B_3$ for dimension $n\leq 5$. Our construction generalize all mentioned results and throws a new light on some of them. We also study the irreducibility and equivalence of the constructed representations. In the present article we show that all representations constructed in [1] may be obtained by taking exponent of the highest weight modules of U(sl}_2 and U_q(sl_2). We generalize these connections between the representation of the braid group $B_n$ and the highest weight modules of the U_q(sl_{n-1}) for arbitrary} n using the well-known reduced Burau representation.

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