论文标题
光子场对带电颗粒纠缠产生的影响
Effects of photon field on entanglement generation in charged particles
论文作者
论文摘要
Bose-Marletto-dedral（BMV）实验[3，4]是测试由于牛顿重力引起的重力量子的量子性质。该提议激发了关于牛顿重力引起的纠缠与量子重力的本质和重力的存在有关的争议。在此激励的情况下，我们分析了两个带电粒子与光子场耦合的纠缠产生。我们假设每个粒子都处于两个轨迹的叠加中，并且光子场最初处于连贯状态。基于协变量量子电动力学，首次得出了带电颗粒的纠缠负词的公式。采用简单的粒子分析轨迹，我们证明了它们之间的纠缠。据观察，由于光子场的真空波动，纠缠受到了纠缠的抑制。我们还发现，布雷姆斯特期的量子叠加的效果出现在纠缠否定公式中。重力理论和电磁理论之间的相似结构表明，通过量子重力辐射在纠缠产生中可以观察到相似的特征。
The Bose-Marletto-Vedral (BMV) experiment [3, 4] is a proposal for testing the quantum nature of gravity with entanglement due to Newtonian gravity. This proposal has stimulated controversy on how the entanglement due to Newtonian gravity is related to the essence of quantum gravity and the existence of gravitons. Motivated by this, we analyze the entanglement generation between two charged particles coupled to a photon field. We assume that each particle is in a superposition of two trajectories and that the photon field is initially in a coherent state. Based on covariant quantum electrodynamics, the formula for the entanglement negativity of the charged particles is derived for the first time. Adopting simple analytic trajectories of the particles, we demonstrate the entanglement between them. It is observed that the entanglement is suppressed by the decoherence due to the vacuum fluctuations of the photon field. We also find that the effect of quantum superposition of bremsstrahlung appears in the entanglement negativity formula. The similar structures between the gravity theory and electromagnetic theory suggests that a similar feature may be observed in the entanglement generation by quantum gravitational radiation.
