论文标题
在弯曲的时空几何形状中进行通信
Towards Communication in a Curved Spacetime Geometry
论文作者
论文摘要
当前的量子通信种族 - 努力建立全球量子网络 - 必须考虑特殊和一般相对论的影响。研究充分的一般相对论效应包括夏皮罗时间延迟，重力镜头和框架拖动，这都是由于质量分布如何改变大地学的方式。在这里，我们报告了时空几何形状的曲率如何影响信息载体沿任意地球的传播。根据Riemann曲率，将变形对载体波函数的显式表达。此外，我们研究了这种抗DE保姆和Schwarzschild几何形状的失真。例如，时空曲率会导致0.10〜RADIAN相移，以在单色激光束和四倍散光的情况下进行地球与国际空间站之间的通信，从而导致结构化模式之间的串扰12.2％。我们的发现表明，这种引力失真很重要，并且需要在发件人或接收方进行预校正或在接收方之前检索信息。
The current race in quantum communication -- endeavouring to establish a global quantum network -- must account for special and general relativistic effects. The well-studied general relativistic effects include Shapiro time-delay, gravitational lensing, and frame dragging which all are due to how a mass distribution alters geodesics. Here, we report how the curvature of spacetime geometry affects the propagation of information carriers along an arbitrary geodesic. An explicit expression for the distortion onto the carrier wavefunction in terms of the Riemann curvature is obtained. Furthermore, we investigate this distortion for anti-de Sitter and Schwarzschild geometries. For instance, the spacetime curvature causes a 0.10~radian phase-shift for communication between Earth and the International Space Station on a monochromatic laser beam and quadrupole astigmatism can cause a 12.2 % cross-talk between structured modes traversing through the solar system. Our finding shows that this gravitational distortion is significant, and it needs to be either pre- or post-corrected at the sender or receiver to retrieve the information.
