论文标题
量子连贯性是否会通过DE Sitter空间中的曲率效应提高吗？
Would quantum coherence be increased by curvature effect in de Sitter space?
论文作者
论文摘要
我们研究了Alice和Bob的两部分系统的De Sitter空间中的量子相干性，他们最初在自由大规模标量场的两种模式之间共享纠缠状态。结果表明，空间横向效应可以同时产生局部相干性和相关性，从而导致两部分系统的总相干性提高。这些结果与临时效应或霍金效应不同，在单个模式近似下，这些效应无法产生局部连贯性，同时又破坏了相关的连贯性，从而导致双分支系统的总相干性降低。有趣的是，我们发现量子相干性与DE Sitter空间中的量子相关性相反。我们还发现，量子相干性最严重地受到了保安空间的曲率影响，对于保形不变性和无质量。我们的结果揭示了DE Sitter空间中的曲率效应与Rindler时空中的iNRUH效应之间的差异或黑洞时空对量子相干性的鹰效应之间的差异。
We study the quantum coherence in de Sitter space for the bipartite system of Alice and Bob who initially share an entangled state between the two modes of a free massive scalar field. It is shown that the space-curvature effect can produce both local coherence and correlated coherence, leading to the increase of the total coherence of the bipartite system. These results are sharp different from the Unruh effect or Hawking effect, which, in the single mode approximation, cannot produce local coherence and at the same time destroy correlated coherence, leading to the decrease of the total coherence of the bipartite systems. Interestingly, we find that quantum coherence has the opposite behavior compared with the quantum correlation in de Sitter space. We also find that quantum coherence is most severely affected by the curvature effect of de Sitter space for the cases of conformal invariance and masslessness. Our result reveals the difference between the curvature effect in the de Sitter space and the Unruh effect in Rindler spacetime or the Hawking effect in black hole spacetime on quantum coherence.
