Contextuality is essential to explain the power of quantum computers and the security of quantum communications. The study has been published in the journal Science Advances.
Quantum Physics
Mar 17, 2022
1
179
Researchers report the development of frequency translating add/drop filters based on electro-optically modulated photonic molecules. The new class of filters could open important new avenues for on-chip light manipulation.
Optics & Photonics
Oct 19, 2021
0
119
Biodegradable microspheres can be used to deliver heart cells generated from stem cells to repair damaged hearts after a heart attack, according to new findings by UCL researchers. This type of cell therapy could one day ...
Bio & Medicine
Jun 10, 2021
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23
EPFL scientists have made an important discovery about the structure of barium titanate, a material used in everyday objects. Their findings refute existing theories on the displacement of the material's atoms.
Materials Science
Jun 09, 2021
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285
Barium titanate is an important electroceramic material used in trillions of capacitors each year and found in most electronics. Penn State researchers have produced the material at record low temperatures, and the discovery ...
Materials Science
Feb 26, 2020
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87
Some materials show promise promoting bone regeneration by enhancing its natural electrical properties, according to a review in the journal Science and Technology of Advanced Materials.
Bio & Medicine
Feb 04, 2020
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11
Researchers have shown mechanical force can start chemical reactions, making them cheaper, more broadly applicable, and more environmentally friendly than conventional methods.
Materials Science
Dec 19, 2019
0
116
Charge density fluctuations are observed in all families of high-critical temperature (Tc) superconducting cuprates. Although constantly found in the underdoped region of the phase diagram at relatively low temperatures, ...
Researchers from the Moscow Institute of Physics and Technology have created a device that acts like a synapse in the living brain, storing information and gradually forgetting it when not accessed for a long time. Known ...
General Physics
Aug 29, 2019
0
543
Ionic conduction involves the movement of ions from one location to another inside a material. The ions travel through point defects, which are irregularities in the otherwise consistent arrangement of atoms known as the ...
Materials Science
May 02, 2019
0
76
Barium ( /ˈbɛəriəm/ bair-ee-əm) is a chemical element with the symbol Ba and atomic number 56. It is the fifth element in Group 2, a soft silvery metallic alkaline earth metal. Barium is never found in nature in its pure form due to its reactivity with air. Its oxide is historically known as baryta but it reacts with water and carbon dioxide and is not found as a mineral. The most common naturally occurring minerals are the very insoluble barium sulfate, BaSO4 (barite), and barium carbonate, BaCO3 (witherite). Barium's name originates from Greek barys (βαρύς), meaning "heavy", describing the high density of some common barium-containing ores.
Barium has few industrial applications, but the metal has been historically used to scavenge air in vacuum tubes. Barium compounds impart a green color to flames and have been used in fireworks. Barium sulfate is used for its density, insolubility, and X-ray opacity. It is used as an insoluble heavy mud-like paste when drilling oil wells, and in purer form, as an X-ray radiocontrast agent for imaging the human gastrointestinal tract. Soluble barium compounds are poisonous due to release of the soluble barium ion, and have been used as rodenticides. New uses for barium continue to be sought. It is a component of some "high temperature" YBCO superconductors, and electroceramics.
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