Nanoparticle levitated by light rotates at 300 billion rpm
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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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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8400
Computer Sciences
A team of researchers affiliated with a host of institutions across China has modified Shor's algorithm in a way that could allow less powerful quantum computers to crack current cryptosystems. The team describes their modifications ...
Computer Sciences
Time crystals. Microwaves. Diamonds. What do these three disparate things have in common?
Jan 20, 2022
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249
Internet
A quantum internet may very well be the first quantum information technology to become reality. Researchers at QuTech in Delft, the Netherlands, today published a comprehensive guide toward this goal in Science. It describes ...
Oct 18, 2018
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Computer Sciences
Google announced Monday that it is making available an open-source library for quantum machine-learning applications.
Electronics & Semiconductors
Solution-processed semiconductors, including materials such as perovskites and quantum dots (i.e., small particles of matter in the quantum size regime), are substances with a conductivity ranging between that of insulators ...
Computer Sciences
Researchers at the National Institute of Standards and Technology (NIST) have constructed and tested a system that allows commercial electronic components—such as microprocessors on circuit boards—to operate in close ...
Feb 24, 2022
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56
Energy & Green Tech
As climate change intensifies summer heat, demand is growing for technologies to cool buildings. Now, researchers report in ACS Energy Letters that they have used advanced computing technology and artificial intelligence ...
Nov 2, 2022
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88
Energy & Green Tech
Since the ancient Greeks, humankind has known that if you bring two things into contact, a small amount of electricity is created. One example is that we can rub a balloon with our hair and generate enough electricity to ...
Jan 27, 2023
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183
Electronics & Semiconductors
University of Texas at Dallas researchers have developed a new approach that addresses challenges in the field of quantum computing and has the potential to revolutionize computing, communications and electronic security.
Mar 23, 2023
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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.
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