arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1108.5220gr-qcmath-phmath.MPquant-ph
收藏

引力的最优量子估计

Optimal Quantum Estimation for Gravitation

T. G. Downes, G. J. Milburn, C. M. Caves

摘要:

在这里,我们描述了经典引力场测量的量子极限。具体来说,我们写下最佳量子克拉美-拉奥下限,任何单一的参数描述的时空度量。标准的时间-能量和海森堡不确定性关系被证明是时空度规的不确定性关系的特殊情况。给出了四个关键的例子,描述量子有限估计:加速度,黑洞,引力波和宇宙学。我们采用弯曲时空中的局部协变量子场论,它允许一个明显的时空独立的推导。其结果是一个适用于所有因果时空流形的不确定关系。

英文摘要:

Here we describe the quantum limit to measurement of the classical gravitational field. Specifically, we write down the optimal quantum Cramer-Rao lower bound, for any single parameter describing a metric for spacetime. The standard time-energy and Heisenberg uncertainty relations are shown to be special cases of the uncertainty relation for the spacetime metric. Four key examples are given, describing quantum limited estimation for: acceleration, black holes, gravitational waves and cosmology. We employ the locally covariant formulation of quantum field theory in curved spacetime, which allows for a manifestly spacetime independent derivation. The result is an uncertainty relation applicable to all causal spacetime manifolds.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑