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arXiv 1603.09280math-phhep-thmath.MPmath.QA
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扭曲双代数胚与Drinfeld扭曲双代数胚

Twisted bialgebroids versus bialgebroids from a Drinfeld twist

Andrzej Borowiec, Anna Pachol

摘要:

Bialgebroids(resp.非交换环上的双代数(Hopf代数)。Drinfeld twist技巧在李代数的(变形)量子化以及底层模代数(=量子空间)中特别有用。Smash积构造将这两个组合成新的代数,事实上,它不依赖于扭曲。然而,我们可以把它变成双代数胚的扭曲依赖的方式。或者,可以在一类双代数胚中使用Drinfeld twist技巧。我们表明,这两种技术中指出的标题:扭曲的双代数或构造一个双代数从扭曲的双代数产生相同的结果的情况下,规范化的上循环扭曲。这对于更好地描述量子变形相空间是有用的。我们认为,在这个bialgebroid框架内,可以证明使用变形坐标(即时空非交换性),这是经常假设,以解释量子引力效应。

英文摘要:

Bialgebroids (resp. Hopf algebroids) are bialgebras (Hopf algebras) over noncommutative rings. Drinfeld twist techniques are particularly useful in the (deformation) quantization of Lie algebras as well as underlying module algebras (=quantum spaces). Smash product construction combines these two into the new algebra which, in fact, does not depend on the twist. However, we can turn it into bialgebroid in the twist dependent way. Alternatively, one can use Drinfeld twist techniques in a category of bialgebroids. We show that both techniques indicated in the title: twisting of a bialgebroid or constructing a bialgebroid from the twisted bialgebra give rise to the same result in the case of normalized cocycle twist. This can be useful for better description of a quantum deformed phase space. We argue that within this bialgebroid framework one can justify the use of deformed coordinates (i.e. spacetime noncommutativity) which are frequently postulated in order to explain quantum gravity effects.

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