In condensed matter physics, Pines' demon or, simply demon is a collective excitation of electrons which corresponds to electrons in different energy bands moving out of phase with each other. Equivalently, a demon corresponds to counter-propagating currents of electrons from different bands. Named after David Pines, who coined the term in 1956, demons are quantum mechanical excited states of a material belonging to a broader class of exotic collective excitations, such as the magnon, phason, or exciton. Pines' demon was first experimentally observed in 2023 by A. A. Husain et al. within the transition-metal oxide distrontium ruthenate (Sr₂RuO₄).
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A method for printing gold nanopatterns onto living tissue and cells could one day be used to integrate smart devices with living tissue for bionics and biosensing.
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Space travel depletes red blood cells and bone, but upon return to Earth, the body recovers with the help of fat stored in the bone marrow.
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MR contrasts made from iron oxide nanoparticles could help expand the clinical applications of portable low-field MRI scanners.
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A new quantum resonator system developed by scientists rapidly passes photons from one superconducting cavity to another without damaging the photons’ quantum states – an essential step towards fast, high-quality quantum gates.
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Pumping patterns that mimic the human heartbeat can drastically reduce turbulence in a fluid that is pumped through pipes.
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Insulators are not, by definition, good carriers of electrical current, but a special type of insulator known as a quantum anomalous Hall insulator can, unexpectedly, support electrical current within its interior, not just its edges.
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Scientists have observed fermionic quasiparticles slowly “disappearing” for the first time, marking a new beginning for research on phase transitions in the quantum world.
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A passive coating that is almost 100% effective at removing ice and frost from surfaces has been unveiled by researchers in China.
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An implantable bioartificial kidney could one day treat kidney failure and free patients from the rigours of dialysis.
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Photons can collide as if they were massive objects thanks to metamaterials known as time interfaces that undergo abrupt changes in their optical properties.
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