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BGG CATEGORY FOR THE QUANTUM SCHRÖDINGER ALGEBRA

Part of: Linear algebraic groups and related topics Lie algebras and Lie superalgebras

Published online by Cambridge University Press:  20 April 2020

GENQIANG LIU  and
YANG LI
GENQIANG LIU
Affiliation:
School of Mathematics and Statistics, Henan University, Kaifeng475004, P.R. China, e-mails: liugenqiangbnu@126.com; 897981524@qq.com
YANG LI
Affiliation:
School of Mathematics and Statistics, Henan University, Kaifeng475004, P.R. China, e-mails: liugenqiangbnu@126.com; 897981524@qq.com
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Abstract

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In 1996, a q-deformation of the universal enveloping algebra of the Schrödinger Lie algebra was introduced in Dobrev et al. [J. Phys. A 29 (1996) 5909–5918.]. This algebra is called the quantum Schrödinger algebra. In this paper, we study the Bernstein-Gelfand-Gelfand (BGG) category $\mathcal{O}$ for the quantum Schrödinger algebra $U_q(\mathfrak{s})$ , where q is a nonzero complex number which is not a root of unity. If the central charge $\dot z\neq 0$ , using the module $B_{\dot z}$ over the quantum Weyl algebra $H_q$ , we show that there is an equivalence between the full subcategory $\mathcal{O}[\dot Z]$ consisting of modules with the central charge $\dot z$ and the BGG category $\mathcal{O}^{(\mathfrak{sl}_2)}$ for the quantum group $U_q(\mathfrak{sl}_2)$ . In the case that $\dot z = 0$ , we study the subcategory $\mathcal{A}$ consisting of finite dimensional $U_q(\mathfrak{s})$ -modules of type 1 with zero action of Z. We directly construct an equivalence functor from $\mathcal{A}$ to the category of finite dimensional representations of an infinite quiver with some quadratic relations. As a corollary, we show that the category of finite dimensional $U_q(\mathfrak{s})$ -modules is wild.

MSC classification

Primary: 17B10: Representations, algebraic theory (weights) 17B37: Quantum groups (quantized enveloping algebras) and related deformations 17B81: Applications to physics
Secondary: 20G42: Quantum groups (quantized function algebras) and their representations
Type
Research Article
Information
Glasgow Mathematical Journal , Volume 63 , Issue 2 , May 2021 , pp. 266 - 279
Copyright
© The Author(s) 2020. Published by Cambridge University Press on behalf of Glasgow Mathematical Journal Trust

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