Here we present a temporally- and spatially-resolved measurement of the double-slit interference pattern using single photons. A distinct wave-like pattern emerges after many discrete particle impacts as if each particle is passing through both slits and interfering with itself. In this famous experiment, particles pass one-by-one through a pair of slits and are detected on a distant screen. The double-slit experiment strikingly demonstrates the wave-particle duality of quantum objects. Tisa, Simone Tosi, Alberto Resch, Kevin J. Kolenderski, Piotr Scarcella, Carmelo Johnsen, Kelsey D. Time-resolved double-slit interference pattern measurement with entangled photons Finally, we exemplified the distribution of single electrons by color-coding according to the above three types of experiments as a composite image. The interference experiments with each single slit and with the asymmetric double slit were carried out under two different electron dose conditions: high-dose for calculation of electron probability distribution and low-dose for each single electron distribution. Here, pre-Fraunhofer condition means that each single- slit observation was performed under the Fraunhofer condition, while the double-slit observations were performed under the Fresnel condition. We developed a method to perform the interference experiment by using an asymmetric double-slit fabricated by a focused ion beam instrument and by operating the microscope under a "pre-Fraunhofer" condition, different from the Fraunhofer condition of conventional double-slit experiments. We used a 1.2-MV field emission electron microscope providing coherent electron waves and a direct detection camera system enabling single-electron detections at a sub-second exposure time. Harada, Ken Akashi, Tetsuya Niitsu, Kodai Shimada, Keiko Ono, Yoshimasa A Shindo, Daisuke Shinada, Hiroyuki Mori, ShigeoĪdvanced electron microscopy technologies have made it possible to perform precise double-slit interference experiments. Interference experiment with asymmetric double slit by using 1.2-MV field emission transmission electron microscope. The conceptual model provides an intuitional picture of the in-phase and out-of-phase photon correlations and a complete quantum understanding about the which-path information of two colored photons. From a two-axis coincidence measurement pattern we can extract complete interference information about two colors. Different from the degenerate case, the experimental results depend on the measurement methods. In this work, we report double-slit interference experiments with two-color biphoton. However, two-photon double-slit interference has been widely studied only for wavelength-degenerate biphoton, known as subwavelength quantum lithography. In classical optics, Young's double-slit experiment with colored coherent light gives rise to individual interference fringes for each light frequency, referring to single-photon interference.
Zhang, De-Jian Wu, Shuang Li, Hong-Guo Wang, Hai-Bo Xiong, Jun Wang, Kaige Young's double-slit interference with two-color biphotons. An experiment is proposed to confirm the causation-retrocausation symmetry of the electron behavior by observing the insensitivity of the interference pattern to non-magnetic obstacles placed in the shadows of the retarded and advanced waves appearing on the rear and front sides of the double-slit. It is seen that the retarded (causal) amplitude of the electron wave expanding from the source shows an advanced (retrocausal) bifurcation and merging in passing through the double-slit and converges towards the detection point as if guided by the advanced (retrocausal) wave from the detected electron. The single electron double-slit interference experiment is given a time-symmetric interpretation and visualization in terms of the intermediate amplitude of transition between the particle source and the detection point. Retrocausation acting in the single-electron double-slit interference experiment
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