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Quantum Cryptography
Published in Shashi Bhushan, Manoj Kumar, Pramod Kumar, Renjith V. Ravi, Anuj Kumar Singh, Holistic Approach to Quantum Cryptography in Cyber Security, 2023
The double-slit experiment is a demonstration that light and matter can display the characteristics of both classically defined waves and particles. It displays the fundamentally probabilistic nature of quantum mechanical phenomena.
Quantum Quagmire: Dead End for Energy Miracles
Published in H. B. Glushakow, Energy Miracles, 2022
It was the inability of the quantum mechanics to account for the fact that light was clearly composed of particles, yet exhibiting the properties of waves, that Prof. Feynman was referring to in the preceding quote. Up until 1900, Newton’s laws were regarded as the foundation of all of physics. His theories involved the concepts of space and time, force and mass, along with the fundamental assumption of a direct connection between cause and effect. Newton held that light was a flow of particles emitted from a luminous source such as the sun; but one that also embodied a wave process. In 1801, the English physicist Thomas Young unveiled an experiment to the members of the Royal Society in London that corroborated Newton’s view. The simple operation, known as the double-slit experiment, demonstrated the wave-like nature of light. In the early 1900s, this experiment was causing great consternation among certain scientists who could not fathom how to embrace the idea that light could be both particle and a wave simultaneously.
Nonlinear Quantum Waves in the Light of Recent Slit Experiments
Published in Shamil U. Galiev, Evolution of Extreme Waves and Resonances, 2020
Richard Feynman famously said that “the double-slit experiment has in it the heart of quantum mechanics. In reality, it contains the only mystery” [33,35]. Below there is an extract from “QED – The strange theory of light and matter” of R.P. Feynman [18,35].
Young’s interference experiment using self-aligned liquid crystal optical control devices
Published in Liquid Crystals, 2023
Tomoya Watanabe, Hiroyuki Okada
Figure 1 shows an overview of the experimental system of Young’s interference experiment using LC phase control device in this study. Light generated from a single light source is divided by a slit in order to induce the interference. The light is then introduced into an optical phase-controlled LC device with an alignment region that is divided into two regions, and interference patterns are independently controlled. In the LC directors in the figure, the orientation of the director is assumed to be twisted nematic alignment. Considering the next application of optical quantum devices, it will be desired that the polarisation states of the two directors are set to be orthogonal based on the Hilbert space theory. For this reason, the orientation direction of the LC in the two domain was initially set to π/2 for the initial incident light. Subsequently, a diffraction pattern of output light is generated on the screen provided through a certain distance. In the double-slit experiment, for example, the output light is into the LC and the phase in the two domain changes, and the interference pattern of output light is changed.
Effects of quantum mechanical identity in particle scattering: experimental observations (and lack thereof)
Published in Journal of the Royal Society of New Zealand, 2021
I should note that partial wave interference is not an effect due to the particles being identical. Indeed, Thomas et al. (2017) presents a case of s+p partial-wave interference for colliding rubidium and potassium atoms. As such, partial-wave interference is brought about by two ‘pathways’ – s and p – for a single atom, akin to Young's double slit experiment.