论文标题
重力时间扩张作为量子传感的资源
Gravitational time dilation as a resource in quantum sensing
论文作者
论文摘要
原子钟干涉仪是测试量子理论与重力之间界面的有价值工具，特别是通过测量量子状态中的重力时间扩张。在这里，我们调查是否还可以将重力时间扩张作为量子信息理论的资源。特别是，我们表明，对于自由下降的干涉仪和Mach-Zhhnder的干涉仪，重力时间扩张可能会提高长期干涉时间的重力加速度的精度。为此，应在路径和时钟自由度上进行干涉测量。
Atomic clock interferometers are a valuable tool to test the interface between quantum theory and gravity, in particular via the measurement of gravitational time dilation in the quantum regime. Here, we investigate whether gravitational time dilation may be also used as a resource in quantum information theory. In particular, we show that for a freely falling interferometer and for a Mach-Zehnder interferometer, the gravitational time dilation may enhance the precision in estimating the gravitational acceleration for long interferometric times. To this aim, the interferometric measurements should be performed on both the path and the clock degrees of freedom.
