Berenstein-Zelevinsky triangles, elementary couplings, and fusion rules
نویسندگان
چکیده
منابع مشابه
Berenstein-Zelevinsky triangles, elementary couplings and fusion rules
We present a general scheme for describing ŝu(N)k fusion rules in terms of elementary couplings, using Berenstein-Zelevinsky triangles. A fusion coupling is characterized by its corresponding tensor product coupling (i.e. its Berenstein-Zelevinsky triangle) and the threshold level at which it first appears. We show that a closed expression for this threshold level is encoded in the Berenstein-Z...
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Information on su(N) tensor product multiplicities is neatly encoded in Berenstein-Zelevinsky triangles. Here we study a generalisation of these triangles by allowing negative as well as positive integer entries. For a fixed triple product of weights, these generalised Berenstein-Zelevinsky triangles span a lattice in which one may move by adding integer linear combinations of so-called virtual...
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ژورنال
عنوان ژورنال: Letters in Mathematical Physics
سال: 1993
ISSN: 0377-9017,1573-0530
DOI: 10.1007/bf00761494