Energy & Green Tech
Novel quantum dot solar cells developed at Los Alamos National Laboratory match the efficiency of existing quantum-dot based devices, but without lead or other toxic elements that most solar cells of this type rely on.
May 18, 2020
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188
Electronics & Semiconductors
Researchers at ShanghaiTech University, the University of Toronto and the Chinese Academy of Sciences have recently developed new solution-processed upconversion photodetectors, which are a class of devices that can detect ...
Security
Quantum computers that are exponentially faster than any of our current classical computers and are capable of code-breaking applications could be available in 12 to 15 years, posing major risks to the security of current ...
Apr 9, 2020
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5
Hi Tech & Innovation
From defence and health information to social networking and banking transactions, communications increasingly rely on cryptographic security amid growing fears of cyberattacks. However, can such sensitive data be unhackable? ...
Mar 27, 2020
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7
Engineering
Researchers have designed a new chip-based device that can shape and steer blue light with no moving parts. The device could greatly reduce the size of light projection components used for augmented reality and a variety ...
Mar 19, 2020
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6
Computer Sciences
Google announced Monday that it is making available an open-source library for quantum machine-learning applications.
Computer Sciences
Quantum computing isn't yet far enough along that it could have helped curb the spread of this coronavirus outbreak. But this emerging field of computing will almost certainly help scientists and researchers confront future ...
Mar 6, 2020
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76
Business
Ginni Rometty, the first female CEO in IBM's century-long history, is leaving the helm in April.
Jan 31, 2020
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3
Engineering
A dumbbell-shaped nanoparticle powered just by the force and torque of light has become the world's fastest-spinning object.
Jan 16, 2020
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Machine learning & AI
Will artificial intelligence one day surpass human thinking? The rapid progress of AI, coupled with our standard fear of machines, has raised concerns that its abilities will one day start to grow uncontrollably, eventually ...
Jan 7, 2020
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13
In physics, a quantum (plural: quanta) is an indivisible entity of a quantity that has the same units as the Planck constant and is related to both energy and momentum of elementary particles of matter (called fermions) and of photons and other bosons. The word comes from the Latin "quantus", for "how much." Behind this, one finds the fundamental notion that a physical property may be "quantized", referred to as "quantization". This means that the magnitude can take on only certain discrete numerical values, rather than any value, at least within a range. There is a related term of quantum number.
A photon is often referred to as a "light quantum". The energy of an electron bound to an atom (at rest) is said to be quantized, which results in the stability of atoms, and of matter in general. But these terms can be a little misleading, because what is quantized is this Planck's constant quantity whose units can be viewed as either energy multiplied by time or momentum multiplied by distance.
Usually referred to as quantum "mechanics", it is regarded by virtually every professional physicist as the most fundamental framework we have for understanding and describing nature at the infinitesimal level, for the very practical reason that it works. It is "in the nature of things", not a more or less arbitrary human preference.
This text uses material from Wikipedia, licensed under CC BY-SA
