标题： 构造QFT时，其中 Lorentz 不变量被紫外区域的耗散效应破坏 显示英文标题

标题： Constructing QFT's wherein Lorentz Invariance is broken by dissipative effects in the UV

摘要： 近期对破坏紫外（UV） sector 洛伦兹不变性的量子场论产生了兴趣，但注意力主要局限于色散理论。在这项工作中，我们提供了研究耗散的广义框架。通过将原始场耦合到额外的（重）场来保持幺正性，这些额外场诱导了耗散效应。从破坏洛伦兹不变性的拉格朗日量开始，我们发现耗散效应不可避免地会在有效理论中发展。然后，我们协变化这些拉格朗日量，以解决超出普朗克尺度的暴胀和黑洞物理问题。额外场诱导耗散的独特性质通过协变化揭示出来。还讨论了与量子引力的唯象方法以及某些膜世界场景之间的联系。 显示英文摘要

摘要： There has been a recent interest in considering Quantum Field Theories in which Lorentz Invariance is broken in the UV sector. However attention has been mostly limited to dispersive theories. In this work we provide the generalized settings for studying dissipation. Unitarity is preserved by coupling the original fields to additional (heavy) fields which induce the dissipation. Starting with Lagrangians breaking LI in the UV, we learn that dissipative effects unavoidably develop in the effective theory. We then covariantize these Lagrangians in order to address the trans-Planckian question of inflation and black hole physics. The peculiar properties of the additional fields inducing dissipation is revealed by the covariantization. The links with the phenomenological approach to Quantum Gravity and with some Brane World scenarios are also discussed.