论文标题
动量踢出不完善的测量
Momentum Kicks in Imperfect Which-Way Measurement
论文作者
论文摘要
关于一个量子是否通过双缝，由于哪种检测行为而经历了“动量踢”，这一问题一直存在激烈的辩论。几十年来，关于这个问题一直存在冲突的观点。此问题在此处解决，该问题可能是不完善的。这里表明，干扰的损失仍然可以解释为量子似乎收到的微小动量踢而产生，而与哪个方向检测器的性质无关。有趣的是，随机动量踢的大小始终是h/2d，d是缝隙分离，无论哪种检测多么完美或不完美。这与早期文献中的建议相反。哪个通道检测的不完美决定了动量踢的频率。早些时候已经显示，为了完美的检测，Quanton在50％的时间内获得了动量。在这里表明，对于哪种通道检测不完善，量子会接收相同大小的动量踢，但频率较低。这里可以找到踢频率与干扰可见性之间的精确关系。
There has been an intense debate on the question as to whether a quanton, passing through a double-slit, experiences a 'momentum kick' due to the act of which-way detection. There have been conflicting points of view on this issue over many decades. This issue is addressed here in the general setting where the which-way detection may be imperfect. It is shown here that the loss of interference may still be interpreted as arising out of tiny momentum kicks which the quanton appears to receive, irrespective of the nature of the which-way detector. Interestingly, the magnitude of the random momentum kicks is always h/2d, d being the slit separation, irrespective of how perfect or imperfect the which-way detection is. This is contrary to what has been suggested in the earlier literature. The imperfection of which-way detection decides how frequent are the momentum kicks. It has been shown earlier that for perfect which-way detection, the quanton receives a momentum kick fifty percent of the time. Here it is shown that for imperfect which-way detection, the quanton receives momentum kicks of the same magnitude, but less often. A precise relation between the frequency of kicks and the visibility of interference is found here.
