Quantum phase-sensitive diffraction and imaging using entangled photons
Quantum phase-sensitive diffraction and imaging using entangled photons
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DOI：
10.1073/pnas.1904839116
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发表时间：
2019-06-11
影响因子：
11.1
通讯作者：
Mukamel, Shaul
中科院分区：
文献类型：
--
作者：
Asban, Shahaf;Dorfman, Konstantin E.;Mukamel, Shaul
我们提出了一种量子衍射成像技术，其中一个光子的纠缠对衍射的样品和检测符合其孪生。该图像是通过扫描不与物质相互作用的光子获得的。我们表明，当一个动态量子系统与外场相互作用时，相位信息以可检测的方式印在场的状态中。与样品相互作用的光子对信号的贡献与I-p（1/2）成比例，其中I-p是源强度，而经典衍射与I/（p）成比例。这使得弱场成像成为可能，提供高信噪比，避免对精细样品的损坏。场状态的施密特分解可以通过重新加权施密特模式贡献来用于图像增强。
We propose a quantum diffraction imaging technique whereby one photon of an entangled pair is diffracted off a sample and detected in coincidence with its twin. The image is obtained by scanning the photon that did not interact with matter. We show that when a dynamical quantum system interacts with an external field, the phase information is imprinted in the state of the field in a detectable way. The contribution to the signal from photons that interact with the sample scales as proportional to I-p(1/2), where I-p is the source intensity, compared with proportional to I/(p) of classical diffraction. This makes imaging with weak fields possible, providing high signal-to-noise ratio, avoiding damage to delicate samples. A Schmidt decomposition of the state of the field can be used for image enhancement by reweighting the Schmidt modes contributions.