论文标题
通过测量相对论量子场理论的互补性和因果关系的互补性传播
Complementarity and causal propagation of decoherence by measurement in relativistic quantum field theories
论文作者
论文摘要
对物体之间的牛顿重力产生的纠缠产生已广泛讨论，以揭示重力的量子性质。在本文中，我们对玛丽和同事对Gedanken实验的略微修改版本进行了量子场理论分析。我们表明，由于探测器的存在而导致的变形在稳定的绿色功能方面随着光的速度传播，因为它应该与相对论场理论的因果关系一致。田地的量子性质，例如按照Keldysh Green功能表示的量子波动或重力的发射，这在由于壳颗粒的产生时也起着重要作用。我们还讨论了我们的设置中的干扰可见性与测量的可见性（称为波颗粒偶性）之间的权衡关系。
Entanglement generation by Newtonian gravitational potential between objects has been widely discussed to reveal the quantum nature of gravity. In this paper, we perform a quantum field theoretical analysis of a slightly modified version of the gedanken experiment by Mari and co-workers. We show that decoherence due to the presence of a detector propagates with the speed of light in terms of a retarded Green's function, as it should be consistent with causality of relativistic field theories. The quantum nature of fields, such as quantum fluctuations or emission of gravitons expressed in terms of the Keldysh Green's function also play important roles in the mechanism of decoherence due to on-shell particle creation. We also discuss the trade-off relation between the visibility of the interference and the distinguishability of the measurement, known as the wave particle duality, in our setup.
