论文标题
两光振幅振幅干涉法，用于精确天文测量法
Two-photon amplitude interferometry for precision astrometry
论文作者
论文摘要
从天文对象中改善光子的量子传感可以提供高分辨率的观测值，从而使许多领域受益，包括一般相对论，暗物质研究和宇宙学。最近有人提出，如果可以向它们提供量子力学纠缠的量子对源，而不是量子机械纠缠的对源，则不需要相位稳定的光学链接，这有可能使迄今为止的较长的基准。开发了这个想法的新完善，其中两个来自不同来源的光子在两个单独且脱钩的站点干扰，仅需要它们之间的缓慢的经典信息链接。我们严格地计算可观察力，并将这种新的干涉技术与汉伯里棕色和Twiss强度干涉法进行对比。我们认为这项技术可以允许对两个来源的相对星形法进行稳健的高精度测量。一个基本的计算表明，在一个晚上观察两个明亮的恒星的观察中，可以在相对开头的$ 10 $〜微弧线订单上获得角度精度。
Improved quantum sensing of photons from astronomical objects could provide high resolution observations in the optical benefiting numerous fields, including general relativity, dark matter studies, and cosmology. It has been recently proposed that stations in optical interferometers would not require a phase-stable optical link if instead sources of quantum-mechanically entangled pairs could be provided to them, potentially enabling hitherto prohibitively long baselines. A new refinement of this idea is developed, in which two photons from different sources are interfered at two separate and decoupled stations, requiring only a slow classical information link between them. We rigorously calculate the observables and contrast this new interferometric technique with the Hanbury Brown & Twiss intensity interferometry. We argue this technique could allow robust high-precision measurements of the relative astrometry of the two sources. A basic calculation suggests that angular precision on the order of $10$~microarcsecond in the relative opening angle could be achieved in a single night's observation of two bright stars.
