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arXiv 1405.7833math.QA
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三角动力学仿射量子群$U_{q,x}(\widehat{sl_2})=U_{q,λ}(\widehat{sl_2})$的两种等价实现、Drinfeld电流和Hopf代数体结构

Two Equivalent Realizations of Trigonometric Dynamical Affine Quantum Group $U_{q,x}(\widehat{sl_2})=U_{q,λ}(\widehat{sl_2})$, Drinfeld Currents and Hopf Algebroid Structures

Bharath Narayanan

摘要:

分别基于Drinfeld电流和$RLL$关系,提出了三角动力学量子仿射代数$U_{q,λ}(\widehat{gl_2})$的两种新实现,记作$U_{q,x}(\widehat{gl_2})$和$U(R_{q,x}(\widehat{gl_2}))$,以及一个具有$x=q^{2P}$的Heisenberg代数$\left\{P,Q\right\}$.在这里,$P$扮演动力学变量$λ$和$Q=\frac{\partial}{\partial P}$的角色。建立了$U_{q,x}(\widehat{gl_2})$到$U(R_{q,x}(\widehat{gl_2}))$的显式同构,它是$U_{q}(\widehat{gl_2})$与$U(R_{q}(\widehat{gl_2}))$的Ding-Frenkel同构在量子仿射代数的Drinfeld实现和Reshetikhin-Tian-Shanksy构造之间的动态扩展。引入了Hopf代数体结构和仿射动力学行列式元,证明了$U_{q,x}(\widehat{sl_2})$与$U(R_{q,x}(\widehat{sl_2}))$同构.动力学构造是基于Jimbo,Konno等人的椭圆量子代数$U_{q,p}(\widehat{sl_2})$的退化为椭圆变量$p \to 0$。

英文摘要:

Two new realizations, denoted $U_{q,x}(\widehat{gl_2})$ and $U(R_{q,x}(\widehat{gl_2}))$ of the trigonometric dynamical quantum affine algebra $U_{q,λ}(\widehat{gl_2})$ are proposed, based on Drinfeld-currents and $RLL$ relations respectively, along with a Heisenberg algebra $\left\{P,Q\right\}$, with $x=q^{2P}$. Here $P$ plays the role of the dynamical variable $λ$ and $Q=\frac{\partial}{\partial P}$. An explicit isomorphism from $U_{q,x}(\widehat{gl_2})$ to $U(R_{q,x}(\widehat{gl_2}))$ is established, which is a dynamical extension of the Ding-Frenkel isomorphism of $U_{q}(\widehat{gl_2})$ with $U(R_{q}(\widehat{gl_2}))$ between the Drinfeld realization and the Reshetikhin-Tian-Shanksy construction of quantum affine algebras. Hopf algebroid structures and an affine dynamical determinant element are introduced and it is shown that $U_{q,x}(\widehat{sl_2})$ is isomorphic to $U(R_{q,x}(\widehat{sl_2}))$. The dynamical construction is based on the degeneration of the elliptic quantum algebra $U_{q,p}(\widehat{sl_2})$ of Jimbo, Konno et al. as the elliptic variable $p \to 0$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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