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arXiv 2401.16482hep-th
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超越威尔逊?来自流形变的 Carroll 理论

Beyond Wilson? Carroll from current deformations

Arjun Bagchi, Aritra Banerjee, Saikat Mondal, Debangshu Mukherjee, Hisayoshi Muraki

AI总结:

本研究针对相对论量子场论时空对称性在极端能量下的变化问题,通过在二维无质量标量场论中加入U(1)流双线性形变,证明耦合调至无穷时相对论共形代数可形变为共形Carroll代数,且对称、反对称两类形变均最终得到Carrollian CFT。

摘要:

在极端能量(极低与极高)下,相对论量子场论(QFT)的时空对称性预计会发生改变:伽利略对称性会在极低能区域出现,而我们将论证,Carroll 对称性会在极高能区域出现。威尔逊重整化群的表述似乎不足以处理量子场论底层庞加莱对称性的这些变化,而且这些剧烈变化似乎不太可能在相对论量子场论的范畴内被观测到。我们证明,与这一预期相反,时空代数的变化会发生在参数空间的最边缘区域。具体而言,我们聚焦于极高能区段,展示当形变的有效耦合被调至无穷大时,添加到二维(无质量)标量场论中的$U(1)$流的双线性项如何将相对论时空共形代数形变为共形 Carroll 代数。我们针对具有多个标量场的理论,分别使用对称和反对称的流-流形变证明了这一点。这两个算符在耦合空间中生成不同类型的量子流:对称算符由 Bogoliubov 变换驱动,反对称算符由谱流驱动,二者最终都在流的末端得到 Carrollian CFT。

英文摘要:

At extreme energies, both low and high, the spacetime symmetries of relativistic quantum field theories (QFTs) are expected to change with Galilean symmetries emerging in the very low energy domain and, as we will argue, Carrollian symmetries appearing at very high energies. The formulation of Wilsonian renormalisation group seems inadequate for handling these changes of the underlying Poincare symmetry of QFTs and it seems unlikely that these drastic changes can be seen within the realms of relativistic QFT. We show that contrary to this expectation, changes in the spacetime algebra occurs at the very edges of parameter space. In particular, we focus on the very high energy sector and show how bilinears of $U(1)$ currents added to a two dimensional (massless) scalar field theory deform the relativistic spacetime conformal algebra to conformal Carroll as the effective coupling of the deformation is dialed to infinity. We demonstrate this using both a symmetric and an antisymmetric current-current deformation for theories with multiple scalar fields. These two operators generate distinct kinds of quantum flows in the coupling space, the symmetric driven by Bogoliubov transformations and the antisymmetric by spectral flows, both leading to Carrollian CFTs at the end of the flow.

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