论文标题
在Dilaton时空中因果断开区域之间连续变量的量子相干性的产生
Generation of quantum coherence for continuous variables between causally disconnected regions in dilaton spacetime
论文作者
论文摘要
我们研究了Garfinkle-Horowitz-Strominger Dilaton黑洞的背景下高斯量子相干性的动力学。结果表明，DILATON场对所有两部分子系统的相干程度具有明显的影响。对于未充电或极端dilaton黑洞的标量场的频率，两部分高斯连贯性不受标量场的频率的影响。发现即使对于一个极端的dilaton黑洞，最初的连贯性也不会被完全破坏，这与量子转向的行为完全不同，因为后者在相同条件下遭受了“突然死亡”。这是非平凡的，因为即使强力引力场破坏了量子相关性，也可以利用量子相干性作为量子信息处理任务的资源。另外，证明初始可分离模式之间的量子相干性的产生更容易，对于低频标量场。同时，量子相干性在一个伴侣对之间平稳产生，并在弯曲的时空中的另一对之间表现出“突然的出生”行为。
We study the dynamics of Gaussian quantum coherence under the background of a Garfinkle-Horowitz-Strominger dilaton black hole. It is shown that the dilaton field has evident effects on the degree of coherence for all the bipartite subsystems. The bipartite Gaussian coherence is not affected by the frequency of the scalar field for an uncharged or an extreme dilaton black hole. It is found that the initial coherence is not completely destroyed even for an extreme dilaton black hole, which is quite different from the behavior of quantum steering because the latter suffers from a "sudden death" under the same conditions. This is nontrivial because one can employ quantum coherence as a resource for quantum information processing tasks even if quantum correlations have been destroyed by the strong gravitational field. In addition, it is demonstrated that the generation of quantum coherence between the initial separable modes is easier for low-frequency scalar fields. At the same time, quantum coherence is smoothly generated betweenone pair of partners and exhibits a "sudden birth" behavior between another pairs in the curved spacetime.
