论文标题
从弱价值的角度来看量子擦除器
The Quantum Eraser from a Weak Values Perspective
论文作者
论文摘要
从弱价值和弱测量理论的角度考虑了双关闭实验的量子橡皮擦变体及其“延迟选择”子变体（在此简要重新引入）。测量某些自旋状态时出现的干扰条纹，然后在测量其他自旋状态时可以“擦除”，这表明是异常的弱值，取决于特定的选择后选择。通过将自旋测量的选择作为一定弱测量的弱值，然后清楚地表明，对于量子橡皮擦实验中发生的情况，物理主张可以而且不能做出什么。具体而言，关于旋转状态的选择“倒角”的主张会影响到粒子穿过的缝隙选择的选择，并提出了一个简单的框架，以理解边缘的出现以及为什么可以“擦除”它们。
The quantum eraser variant of the double-slit experiment, and its 'delayed choice' sub-variant, are considered from the perspective of weak value and weak measurement theory (which is briefly reintroduced here). The interference fringes that appear when measuring certain spin states, which can then be 'erased' when measuring other spin states, are shown to be anomalous weak values that depend on particular post-selection choices. By framing the choice of spin measurement as a weak value of a certain weak measurement, it is then made clear what physical claims can and cannot be made about what occurs in the quantum eraser experiment. Specifically, claims about the choice of spin-state `retrocausally' influencing the choice of slit(s) for the particles to travel through are discredited, and a simple framework is presented for understanding how the fringes arise and why they can be 'erased'.
