Devrari Vipin, Singh Mandip
Department of Physical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector-81, Mohali, 140306, India.
Sci Rep. 2024 Sep 3;14(1):20438. doi: 10.1038/s41598-024-71091-1.
Principle of quantum superposition permits a photon to interfere with itself. As per the principle of causality, a photon must pass through the double-slit prior to its detection on the screen to exhibit interference. In this paper, a double-slit quantum interference experiment with reversible detection of Einstein-Podolsky-Rosen quantum entangled photons is presented. Where a photon is first detected on a screen without passing through a double-slit, while the second photon is propagating towards the double-slit. A detection event on the screen cannot affect the second photon with any signal propagating at the speed of light, even after its passage through the double-slit. After the detection of the first photon on the screen, the second photon is either passed through the double-slit or diverted towards a stationary photon detector. Therefore, the question of whether the first photon carries the which-path information of the second photon in the double-slit is eliminated. No single photon interference is exhibited by the second photon, even if another screen is placed after the double-slit.
量子叠加原理允许一个光子与自身发生干涉。根据因果律，一个光子在屏幕上被探测到之前必须先穿过双缝才能表现出干涉现象。在本文中，提出了一个对爱因斯坦 - 波多尔斯基 - 罗森量子纠缠光子进行可逆探测的双缝量子干涉实验。其中，一个光子先在未穿过双缝的情况下在屏幕上被探测到，而第二个光子正朝着双缝传播。即使第二个光子穿过双缝后，屏幕上的探测事件也无法以任何以光速传播的信号影响第二个光子。在屏幕上探测到第一个光子后，第二个光子要么穿过双缝，要么转向一个静止的光子探测器。因此，消除了第一个光子是否携带第二个光子在双缝中的路径信息这一问题。即使在双缝之后放置另一个屏幕，第二个光子也不会表现出单光子干涉。
