标题： 通过施温格-凯尔迪什和卡达诺夫-贝姆形式主义以及量子玻尔兹曼方程，引力子介导的光子极化-极化纠缠 显示英文标题

标题： Graviton mediated polarisation-polarisation entanglement of photons by means of the Schwinger Keldysh and Kadanoff Baym formalisms and Quantum Boltzmann equations

摘要： 为了证明引力子是一种量子实体，提出了一项实验，该实验可以显示量子纠缠是通过引力子的交换产生的。 为此，必须能够观察实验中所考虑的两个物体之间的纠缠，并能够消除其他纠缠源，如虚光子的交换。 通过源自施温格-凯尔迪什和卡达诺夫-巴姆形式主义的方法，结合量子玻尔兹曼类型方程，正在分析由引力子介导的极化-极化光子纠缠。 讨论了在宇宙学背景下的应用。 显示英文摘要

摘要： In order to show that the graviton is a quantum entity an experiment is proposed that can show that quantum entanglement is produced by means of an exchange of gravitons. For this to be possible, one has to be able to witness the entanglement between the two objects considered in the experiment and to be able to eliminate other sources of entanglement like the exchange of virtual photons. Graviton mediated polarisation-polarisation photon entanglement is being analysed by methods originating from the Schwinger Keldysh and the Kadanoff Baym formalisms in conjunction with quantum Boltzmann type equations. Applications in the context of cosmology are discussed.