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arXiv math-ph/0305061math-phhep-thmath.MPmath.PR
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共形变换与SLE配分函数鞅

Conformal transformations and the SLE partition function martingale

Michel Bauer, Denis Bernard

摘要:

我们提出了一个实现在共形场论(CFT)的局部有限共形变换固定一个点。当不动点是原点或无穷远点时,我们给出明确的构造。这两种情况都涉及到维拉索罗代数的Borel子代数的幂。我们用它来建立相干态表示,并推导出一个密切的模拟威克定理的维拉索罗代数。这允许计算共形配分函数在非平凡的几何形状,从上半平面去除外壳获得。然后将其应用于随机Loewner演化(SLE)。我们给出了严格的推导方程,以前获得的作者,连接随机Loewner方程的表示理论的维拉索罗代数。给出了一个新的证明,证明了该构造枚举所有多项式SLE鞅。当从上半平面移除的壳之一是SLE壳时,我们证明了配分函数是概率学家已知的著名的局部鞅,从而揭开了它的CFT起源。

英文摘要:

We present an implementation in conformal field theory (CFT) of local finite conformal transformations fixing a point. We give explicit constructions when the fixed point is either the origin or the point at infinity. Both cases involve the exponentiation of a Borel subalgebra of the Virasoro algebra. We use this to build coherent state representations and to derive a close analog of Wick's theorem for the Virasoro algebra. This allows to compute the conformal partition function in non trivial geometries obtained by removal of hulls from the upper half plane. This is then applied to stochastic Loewner evolutions (SLE). We give a rigorous derivation of the equations, obtained previously by the authors, that connect the stochastic Loewner equation to the representation theory of the Virasoro algebra. We give a new proof that this construction enumerates all polynomial SLE martingales. When one of the hulls removed from the upper half plane is the SLE hull, we show that the partition function is a famous local martingale known to probabilists, thereby unravelling its CFT origin.

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