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Conservatoire Numérique des Arts et Métiers A physicist's best friend: Quantum coherence in diamond augments fluorescence thermometry (Phys.org) —Thermometry – the measurement of temperature – is critical to a wide range of applications, including many industrial processes, biomedical monitoring, and environmental regulatory systems. However, measuring temperature in the presence of high RF (radio frequency) or other electromagnetic fields – such as are found in aerospace, automotive and medical systems – cannot be accomplished using electrical thermometric probes. In these cases, optical sensors that allow scientists to perform thermometry based on thermally-driven changes in fluorescence (brightness) are the instrument of choice. While typical fluorescence thermometers use millimeter-scale optical probes, smaller devices are needed to measure temperatures in intracellular and other nanoscale environments. As a result, the field has witnessed the development of nanoscale fluorescence thermometers based on quantum dots, rare-earth ions and nanogels. Prof.
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Quantum Weirdness Replaced by Classical Fluid Dynamics – The Resonance Project Foundation A French team of scientists, led by Physicists Yves Couder and Emmanuel Fort, investigated alternative possibilities in the wave-particle duality interpretation of the double slit experiment by observing bouncing droplets in a vibrating oil bath. The remarkable results have caught the attention of the public eye as this approach may resolve some of the weirdest behaviors of particles at the quantum scale. Couder and Fort demonstrate in a simple experiment that fluid dynamics may be the classical underlying mechanism of quantum particles apparent strange behaviors without resorting to the need for a mysterious and seemingly magical interpretation of modern quantum theory. It is my firm belief that the last seven decades of the twentieth century will be characterized in history as the dark ages of theoretical physics. I no longer regard this [statistical] interpretation as a finally satisfactory one, even if it proves useful in practice. By: William Brown
Free eBooks at Planet eBook - Classic Novels and Literature World Public Library Du quantique dans l’écoulement de l’eau Le niveau monte. Bientôt pour devenir plombier, il faudra maîtriser la physique quantique, cette théorie des particules dont on se demande bien comment elle aiderait à régler des soucis de tuyaux. Pourtant, sans elle, impossible de résoudre un problème de plomberie vieux d’une quinzaine d’années, à en croire un article paru dans Nature, le 3 février. Depuis plusieurs années, les physiciens ont découvert que l’eau s’écoule 10 000 fois plus vite dans de microscopiques tubes de quelques dizaines de nanomètres de diamètre fait en carbone. Pour expliquer ces phénomènes, Lydéric et Marie-Laure Bocquet (ENS Paris) avec Nikita Kavokine (ENS Paris et Institut Flatiron à New York) ont profité des périodes de confinement pour se plonger dans la littérature scientifique, y compris dans des grimoires que leurs spécialités, la chimie et l’hydrodynamique, ignoraient jusqu’alors. Ils ont ensuite testé une première hypothèse quantique. Idem pour l’effet du diamètre du tuyau.
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Un effet quantique serait à l’origine des mutations spontanées de l'ADN ⇧ [VIDÉO] Vous pourriez aussi aimer ce contenu partenaire (après la pub) La complexité de toute forme de vie sur Terre se base principalement sur la précision de l’information génétique, compressée dans chaque cellule qui la compose. Cependant, il arrive que cette précision subisse des erreurs pouvant conduire à des incompatibilités ou des mutations de l’ADN. Il suffit que la nature des liaisons hydrogène entre les paires de bases change très légèrement pour qu’un défaut d’appariement se produise. James Watson et Francis Crick se sont inspirés des travaux de Rosalind Franklin et Maurice Wilkins pour découvrir en 1952 la structure en double hélice de l’ADN. Un défaut dans la liaison hydrogène peut rompre cet équilibre strict en faisant s’assembler les mauvaises paires de bases, et entraîner ainsi ce que l’on appelle une incompatibilité d’ADN. Source : Nature Communications Physics
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