膨胀宇宙中高斯态的量子失谐
Quantum discord of Ganssian states in an expanding universe
AI总结：
该研究探究膨胀宇宙中连续变量量子失谐的再分配，发现其对膨胀率更敏感，不同模式对的诱导失谐程度有差异，还指出低动量最优质量粒子利于提取宇宙信息，丰富了相关理论框架。
AI中文摘要：
我们在膨胀宇宙的框架内研究连续变量量子失谐的再分配。我们发现，量子失谐对时空膨胀率的敏感性强于对膨胀体积的敏感性。随着膨胀率和膨胀体积的增加，两个玻色模式共享的初始量子失谐会衰减，而基础时空膨胀会在额外的模式对中诱导出量子失谐，这表明量子关联在整个系统中发生了全局再分配。具体而言，诱导的失谐在跨观测者的玻色-反玻色模式对中最大，其次是同观测者的玻色-反玻色模式对，在反玻色模式对中最小。此外，我们的量子失谐分析表明，低动量且质量最优的粒子是提取膨胀宇宙信息的更优候选者。本研究极大丰富了膨胀时空中量子失谐的理论框架，为进一步研究提供了新视角和坚实的理论基础。
英文摘要：
We investigate the redistribution of continuous-variable quantum discord within the framework of an expanding universe. We find that quantum discord exhibits stronger sensitivity to the spacetime expansion rate than to the expansion volume. As both the expansion rate and expansion volume increase, the initial quantum discord shared by the two bosonic modes decays, while quantum discord is induced in additional mode pairs by the underlying spacetime expansion, signaling a global redistribution of quantum correlations across the system. Specifically, the induced discord is largest for cross-observer bosonic-antibosonic pairs, followed by same-observer bosonic-antibosonic pairs, and smallest for the pair of antibosonic modes. Furthermore, our quantum discord analysis demonstrates that particles with lower momentum and optimal mass serve as more favorable candidates for extracting information about the expanding universe. This work substantially enriches the theoretical framework of quantum discord in expanding spacetimes, and provides new perspectives as well as a solid theoretical foundation for further investigations.
