Category: Physics

Why the most important topic in physics could be statistical mechanics

Statistical mechanics helps relate the quantum world to objects that seem solid and not governed by the whims of observation, but there are still questions to be answered, says Chanda Prescod-Weinstein Physics | Columnist 1 February 2023 Town Chanda Prescod-Weinstein Daria Kulkova/Alamy I RECENTLY walked by a physics department office that had a sticker on …

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Astronomers identify 20 ultraviolet-emitting supernova remnants in the Andromeda Galaxy

Positions of the 20 SNRs with detected diffuse UV emission (red squares) and of the 5 SNRs with likely, but confused, diffuse emission (blue squares), overlaid on the image of the Andromeda Galaxy in the F148W filter. Credit: Leahy et al, 2023 Using the AstroSat satellite, astronomers from the University of Calgary, Canada, have identified …

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Unexpected Discovery Seemingly Defies Long-Held Experimental Law of Physics, Research Team Claims

A discovery involving variance in friction at different speeds between two different kinds of surfaces seemingly defies an experimental law of physics, according to newly published research. An international team of researchers with the University of Basel and Tel Aviv University report that friction between graphene structures against platinum surfaces appears to vary with speed, …

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Laser-driven neutron generation realizing single-shot resonance spectroscopy

Setup of the Laser-driven Neutron Source (LDNS) and the beamline for the neutron resonance absorption spectroscopy experiment developed by Osaka University. (b) The neutron spectrum showing the elements of the sample (Indium, Tantalum and Silver) located on the neutron beamline. The spectrum was obtained by a single pulse of neutrons lasting just 1/100,000,000 sec. Credit: …

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Pseudospin-selective Floquet band engineering in black phosphorus

Oka, T. & Aoki, H. Photovoltaic Hall effect in graphene. Phys. Rev. B 79081406(R) (2009). Article Google Scholar Kitagawa, T., Oka, T., Brataas, A., Fu, L. & Demler, E. Transport properties of nonequilibrium systems under the application of light: photoinduced quantum Hall insulators without Landau levels. Phys. Rev. B 84235108 (2011). Article Google Scholar Lindner, …

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Tunable itinerant spin dynamics with polar molecules

Manousakis, E. The spin-1/2 Heisenberg antiferromagnet on a square lattice and its application to the cuprous oxides. Rev. Against. Phys. https://doi.org/10.1103/RevModPhys.63.1 (1991). Google Scholar Žutić, I., Fabian, J. & Das Sarma, S. Spintronics: fundamentals and applications. Rev. Against. Phys. 76323–410 (2004). Article Google Scholar Wineland, DJ, Bollinger, JJ, Itano, WM, Moore, FL & Heinzen, DJ …

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Scientists report on a quasiparticle that can transfer heat under electrical control

Schematic representation of a ferron in a displacive ferroelectric. An atomic representation and resulting dipole moment of a ferroelectric BaTiO3where the red atoms are O2− and the blue-gray atom is Ti4+. (A) The average atomic positions above the critical temperature TC. (B) A symmetric soft optical phonon excitation. (C) A polarized ferroelectric at T less …

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New time lapse video shows 12 years of exoplanets orbiting their star

Credit: Northwestern University In 2008, HR8799 was the first extrasolar planetary system ever directly imaged. Now, the famous system stars in its very own video. Using observations collected over the past 12 years, Northwestern University astrophysicist Jason Wang has assembled a stunning time lapse video of the family of four planets—each more massive than Jupiter—orbiting …

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