There have been several experiments which hint at evidence for superluminal transport of electromagnetic energy through a material slab. On the theoretical side, it has appeared evident that acausal signals are indeed possible in quantum electrodynamics. However, it is unlikely that superluminal signals can be understood on the basis of a purely classical electrodynamic signals passing through a material. The classical and quantum theories represent quite different views, and it is the quantum view which may lead to violations of Einstein causality.
Causal signal transmission by quantum fields. Electromagnetic interaction of distinguishable devices and the optical equivalence theorem
旋转波近似之外的电磁相互作用的广义相空间技术[L.P.和S.S.,arXiv:1104.3825(2011)]应用于可区分设备的交互。这篇论文是建立在“做量子电动力学,同时思考经典”的概念,这是一个推广的Sudarshan著名的光学等效定理[E.C.G. Sudarshan,Phys. Rev. Lett. 10,277(1963)]到相互作用的电磁场。这个概念允许人们将固有的量子问题简化为半经典问题。
Consistency between causality and complementarity guaranteed by the Robertson inequality in quantum field theory
关于引力是否应该量子化的争论由来已久。最近,作者在[Sci。Rep. 6,22777(2016); Proc. Natl. Acad. Sci. U.S.A. 106,3035(2009)]讨论了涉及质量/带电体量子叠加的Gedanken实验中因果关系和互补性之间的不一致性,Belenchia等人[Phys. Rev. D 98,126009(2018); Int. J. Mod. Phys. D 28,1943001(2019)]通过要求引力/电磁场的量子辐射和真空涨落解决了不一致性。受他们工作的启发,我们根据量子场论重新分析了因果性和互补性这两种物理性质之间的一致性。在这个分析中,我们考虑一个Gedanken实验的启发[科学。Rep. 6,22777(2016); Proc. Natl. Acad. Sci. U.S.A. 106,3035(2009); Phys. Rev. D 98,126009(2018); Int. J. Mod. Phys. D 28,1943001(2019)],其中与光子场耦合的两个带电粒子处于两个轨迹的叠加中。首先,我们观察到,因果关系是由光子场的延迟传播满足。其次,通过引入可见度和路径信息之间的不等式,我们证明了光子场的量子辐射和真空涨落确保了互补性。我们进一步发现,与光子场相关的Robertson不等式导致了Gedanken实验中因果性和互补…
Relativistic Quantum Field Theory Approach to Wavepacket Tunneling: Lack of Superluminal Transmission
Laboratoire de Physique Théorique et Modélisation, CNRS Unité 8089, CY Cergy Paris Université(CY塞吉-巴黎大学);Research Unit Lasers and Spectroscopies (UR-LLS), naXys & NISM, University of Namur(纳穆尔大学);Departmento de Química-Física, Universidad del País Vasco, UPV/EHU(巴斯克联邦大学);EHU Quantum Center, Universidad del País Vasco, UPV/EHU(巴斯克联邦大学);Departamento de Física Aplicada, Universidad del País Vasco, UPV/EHU(巴斯克联邦大学);IKERBASQUE, Basque Foundation for Science(伊克尔巴斯克)