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arXiv 2002.00018hep-th
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欧氏路径积分态的模哈密顿量

Modular Hamiltonians for Euclidean Path Integral States

Srivatsan Balakrishnan, Onkar Parrikar

摘要:

我们研究半空间/Rindler模块哈密顿激发态的相对论量子场论中的欧几里德路径积分的本地运营商打开源。我们推导出一个简单的,显然是洛伦兹公式的模块化哈密顿量的所有订单在扰动理论的来源。我们把这个公式应用到真空态下形状变形的半空间的情形,得到了形状变形中所有阶的对应模哈密顿量,即应力张量分量沿未来和过去的林德勒视野整合。在形状变形为零的特殊情况下,我们的微扰级数可以被简化,并且与已知的Rindler视界零切真空模哈密顿公式精确一致。最后,我们研究了共形场论中关联函数内部局部算子模流(对应于欧几里德路径积分态)的一些普适性质。特别是,我们展示了如何流成为当地的推动在限制的运营商正在流动的方法纠缠切割。

英文摘要:

We study half-space/Rindler modular Hamiltonians for excited states created by turning on sources for local operators in the Euclidean path integral in relativistic quantum field theories. We derive a simple, manifestly Lorentzian formula for the modular Hamiltonian to all orders in perturbation theory in the sources. We apply this formula to the case of shape-deformed half spaces in the vacuum state, and obtain the corresponding modular Hamiltonian to all orders in the shape deformation in terms of products of half-sided null energy operators, i.e., stress tensor components integrated along the future and past Rindler horizons. In the special case where the shape deformation is purely null, our perturbation series can be resummed, and agrees precisely with the known formula for vacuum modular Hamiltonians for null cuts of the Rindler horizon. Finally, we study some universal properties of modular flow (corresponding to Euclidean path integral states) of local operators inside correlation functions in conformal field theories. In particular, we show how the flow becomes the local boost in the limit where the operator being flowed approaches the entanglement cut.

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