论文标题
量子图像之间的多光子相关性
Multiphoton Correlations between Quantum Images
论文作者
论文摘要
迄今为止，通过参数下调产生的纠缠量子图像的实验演示仅限于研究两个光子相关性。在这里，我们显示量子图像之间的多光子相关性在实验中可访问，并表现出许多新特征，包括对双光子波函数的相位敏感。作为一个具体的示例，我们考虑了对现有量子成像实验的修改，其中CCD摄像机从焦点中移出，为产生的4个光子互动提供详细的分析预测，并通过数值模拟来支持这些预测。提出的实验也可以解释为纠缠交换：鲍勃的光子最初未进入，但是对爱丽丝光子的联合检测将鲍勃的光子投射到纠缠状态。这里提出的一般方法可以扩展到涉及高维纠缠的其他量子光学实验。
Experimental demonstrations of entangled quantum images produced through parametric downconversion have so far been confined to studying two photon correlations. Here we show that multiphoton correlations between quantum images are accessible experimentally and exhibit many new features including being sensitive to the phase of the bi-photon wavefunction. As a concrete example, we consider a modification of existing quantum imaging experiments in which the CCD cameras are moved out of focus, provide detailed analytical predictions for the resulting 4 photon intereferences, and support these by numerical simulations. The proposed experiment can also be interpreted as entanglement swapping: Bob's photons are initially unentangled, but the joint detection of Alice's photons projects Bob's photons onto an entangled state. The general approach proposed here can be extended to other quantum optics experiments involving high dimensional entanglement.
