庞加莱不变性与乌尔赫效应
Poincaré invariance and the Unruh effect
AI总结：
本文探讨了量子场论中真空的庞加莱不变性与乌尔赫效应的核心矛盾，指出传统观点的不足，并提出因果性强制量化方法下乌尔赫效应不存在。
摘要：
在量子场论中，真空通常被视为复杂介质，包含虚粒子-反粒子对。对经历均匀加速度的观察者而言，这些虚粒子会变得真实，表现为温度随加速度增加的气体，即乌尔赫效应。然而，研究表明真空复杂性是人为处理量子场论时未显式强制因果性所产生的伪象。选择强制因果性的量化方法，量子场论真空则贫乏，甚至缺乏虚粒子。本文显示，加速度对平凡真空无影响，因此在这样的量子场论处理中不存在乌尔赫效应。由于标准计算表明存在乌尔赫效应在形式上一致，因此必须存在被通常分析所忽略的抵消贡献。本文认为，这是常规洛伦兹变换对乌尔赫探测器结构的动力学作用。
英文摘要：
In quantum field theory, the vacuum is popularly considered to be a complex medium populated with virtual particle + antiparticle pairs. To an observer experiencing uniform acceleration, it is generally held that these virtual particles become real, appearing as a gas at a temperature that grows with the acceleration. This is the Unruh effect. However, it has been shown that vacuum complexity is an artifact, produced by treating quantum field theory in a manner that does not manifestly enforce causality. Choosing a quantization approach that patently enforces causality, the quantum field theory vacuum is barren, bereft even of virtual particles. We show that acceleration has no effect on a trivial vacuum; hence, there is no Unruh effect in such a treatment of quantum field theory. Since the standard calculations suggesting an Unruh effect are formally consistent, insofar as they have been completed, there must be a cancelling contribution that is omitted in the usual analyses. We argue that it is the dynamical action of conventional Lorentz transformations on the structure of an Unruh detector.
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