论文标题
具有极化纠缠光子非局部性的模型独立研究
A model independent study of nonlocality with polarization entangled photons
论文作者
论文摘要
非局部性是量子力学的基本方面，这是由于违反贝尔不平等或其变体而见证的，所有相关研究都假定当地现实理论所表现出的一些相关性。贝尔定理的策略是建立一些标准，以将当地现实的理论与纠缠系统的非本地性质区分开来。在这里，我们提出了一项非局部性的独立模型研究，不需要假设任何局部理论，因为对预期的非局部效应的观察在机械上是直接的量子。我们的建议涉及一个二分极化系统，当在另一个CP状态下检测到其在太空距离处的伴侣时，一个光子立即降低到圆形极化（CP）状态。可以机械监测光子的状态还原，因为CP光子具有角动量并在半波板上施加了扭矩，其机械运动是可测量的，这是量子力学和与任何局部现实假设无关的。
Nonlocality as a fundamental aspect of quantum mechanics is witnessed by violation of Bell inequality or its variants, for which all relevant studies assume some correlations exhibited by local realistic theories. The strategy of Bell's theorem is to establish some criteria to distinguish local realistic theories from quantum mechanics with respect to the nonlocal nature of entangled systems. Here we propose a model independent study of nonlocality that needs not to assume any local theory since observation of the expected nonlocal effect is straightforward quantum mechanically. Our proposal involves a bipartite polarization-entangled system in which one photon immediately reduces into a circular-polarization (CP) state when its partner at a space-like distance is detected in another CP state. The state reduction of the photon can be mechanically monitored because a CP photon carries angular momentum and exerts a torque on a half-wave plate whose mechanical motion is measurable, which is well described by quantum mechanics and independent of any local realistic assumption.
