论文标题
纠缠与连贯的离域物质收获
Entanglement harvesting with coherently delocalized matter
论文作者
论文摘要
我们研究了原子，离子或分子等物质系统的纠缠收集，其质量自由度的中心是量子定位的，并且对相对论的量子场进行了量子。我们采用广泛的Unruh-Dewitt检测器模型来进行光 - 物质的相互作用，并研究了两个DeLocalized检测器系统的量子波函数的量子量中心的相干扩散会影响他们通过与量子场各自的相互作用的相互作用而彼此纠缠的能力。对于最初具有高度局部质量中心的非常庞大的探测器，我们恢复了带有经典自由度中心的指尖型Unruh-Dewitt探测器的纠缠收获结果。我们发现，在检测器的质量定居者的初始中心中，纠缠收集被抑制了高斯。我们进一步发现，通常用于建模由于其原子轨道引起的有限原子大小的空间涂抹曲线不适合模型的质量下降轨道化中心。最后，对于连贯的离域检测器，我们将真空中的纠缠收获与媒体中的纠缠收获进行了比较。我们发现，在波传播速度比光的真空速度小得多的培养基中，纠缠收集受到了显着抑制。
We study entanglement harvesting for matter systems such as atoms, ions or molecules, whose center of mass degrees of freedom are quantum delocalized and which couple to a relativistic quantum field. We employ a generalized Unruh-deWitt detector model for the light-matter interaction, and we investigate how the coherent spreading of the quantum center of mass wave function of two delocalized detector systems impacts their ability to become entangled with one another, via their respective interaction with a quantum field. For very massive detectors with initially highly localized centers of mass, we recover the results of entanglement harvesting for pointlike Unruh-deWitt detectors with classical center of mass degrees of freedom. We find that entanglement harvesting is Gaussian suppressed in the initial center of mass delocalization of the detectors. We further find that spatial smearing profiles, which are commonly employed to model the finite size of atoms due to their atomic orbitals, are not suited to model center of mass delocalization. Finally, for coherently delocalized detectors, we compare entanglement harvesting in the vacuum to entanglement harvesting in media. We find that entanglement harvesting is significantly suppressed in media in which the wave propagation speed is much smaller than the vacuum speed of light.
