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arXiv 1402.2884math-phgr-qchep-thmath.MP
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一个具有宇宙学常数的(2+1)非对易Drinfel'd二重时空

A (2+1) non-commutative Drinfel'd double spacetime with cosmological constant

Angel Ballesteros, Francisco J. Herranz, Catherine Meusburger

摘要:

我们证明了与标准量子形变$sl_η(2,R)$相关的Drinfel'd double同构于初始形变参数$η$与宇宙学常数$Λ=-η^2$相关的(2+1)维AdS代数.这就产生了一个非对易闵可夫斯基时空的推广,它是由于(2+1)引力对非零宇宙学常数的量子双对称性而产生的。将这种对称性推广到$Λ\neq 0$情形的AdS量子双的性质被勾画出来,并且表明新的非对易AdS时空是闵可夫斯基时空的非线性$Λ$ -变形。

英文摘要:

We show that the Drinfel'd double associated to the standard quantum deformation $sl_η(2,R)$ is isomorphic to the (2+1)-dimensional AdS algebra with the initial deformation parameter $η$ related to the cosmological constant $Λ=-η^2$. This gives rise to a generalisation of a non-commutative Minkowski spacetime that arises as a consequence of the quantum double symmetry of (2+1) gravity to non-vanishing cosmological constant. The properties of the AdS quantum double that generalises this symmetry to the case $Λ\neq 0$ are sketched, and it is shown that the new non-commutative AdS spacetime is a nonlinear $Λ$-deformation of the Minkowskian one.

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