Elliptic algebra U_{q,p}(^sl_2): Drinfeld currents and vertex operators

Details Elliptic algebra U_{q,p}(^sl_2): Drinfeld currents and vertex operators Elliptic algebra U_{q,p}(^sl_2): Drinfeld currents and vertex operators

1998-01-31

arxiv.org/abs/math/9802002v5

Mathematics

Quantum Algebra

49 pages, (AMS-)LaTeX ; added an explanation of integration contours; added comments. To appear in Comm. Math. Phys. Numbering

Scientific paper

10.1007/s002200050514

We investigate the structure of the elliptic algebra U_{q,p}(^sl_2) introduced earlier by one of the authors. Our construction is based on a new set of generating series in the quantum affine algebra U_q(^sl_2), which are elliptic analogs of the Drinfeld currents. They enable us to identify U_{q,p}(^sl_2) with the tensor product of U_q(^sl_2) and a Heisenberg algebra generated by P,Q with [Q,P]=1. In terms of these currents, we construct an L operator satisfying the dynamical RLL relation in the presence of the central element c. The vertex operators of Lukyanov and Pugai arise as `intertwiners' of U_{q,p}(^sl_2) for level one representation, in the sense to be elaborated on in the text. We also present vertex operators with higher level/spin in the free field representation.

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