We study unilateral coherence and coherence distribution in the background of a Schwarzschild black hole. We find that, comparing to the flat spacetime, two types of unilateral coherence corresponding to the measurements on system A and system B, respectively, are asymmetric for any Hawking temperature, and the accessible coherence of system B is bigger than the accessible coherence of system A in curved spacetime. We also find that the local coherence of system B reduces with the increase of Hawking temperature, while the local coherence of system A remains unchanged. Unlike behavior of quantum entanglement in curved spacetime, the remaining coherence (correlated coherence) increases with the increase of finitevalued Hawking temperature.

我们研究了 Schwarzschild 黑洞背景下的单边相干性和相干性分布。我们发现，与平坦时空相比，系统A和系统B的测量分别对应的两种单边相干对于任何霍金温度都是不对称的，并且系统B的可达相干大于系统的可达相干A在弯曲的时空中。我们还发现系统B的局部相干性随着霍金温度的升高而降低，而系统A的局部相干性随着霍金温度的升高而降低保持不变。与弯曲时空中的量子纠缠行为不同，剩余相干性（相关相干性）随着有限值霍金温度的增加而增加。