Archive for the ‘computing’ category: Page 622
Mar 11, 2019
Quantum computing could change the way the world uses energy
Posted by Genevieve Klien in categories: computing, quantum physics
Mar 11, 2019
Using quantum measurements to fuel a cooling engine
Posted by Genevieve Klien in categories: computing, quantum physics
Researchers at the University of Florence and Istituto dei Sistemi Complessi, in Italy, have recently proved that the invasiveness of quantum measurements might not always be detrimental. In a study published in Physical Review Letters, they showed that this invasive quality can actually be exploited, using quantum measurements to fuel a cooling engine.
Michele Campisi, one of the researchers involved in the study, has been studying quantum phenomena for several years. In his recent work, he investigated whether quantum phenomena can impact the thermodynamics of nanoscopic devices, such as those employed in quantum computers.
“Most colleagues in the field were looking at coherence and entanglement while only few were looking at another at genuine quantum phenomenon, i.e., the quantum measurement process,” Campisi told Phys.org. “Those studies suggested that you need to accompany measurements with feedback control, as in Maxwell’s demon, in order to exploit their potential. I started thinking about it, and eureka—since quantum measurements are very invasive, they are accompanied by energy exchanges, hence can be used to power engines without the need to do feedback control.”
Mar 7, 2019
A student accidentally created a rechargeable battery that could last 400 years
Posted by Paul Battista in categories: computing, mobile phones
There’s no better example of that than a 2016 discovery at the University of California, Irvine, by doctoral student Mya Le Thai. After playing around in the lab, she made a discovery that could lead to a rechargeable battery that could last up to 400 years. That means longer-lasting laptops and smartphones and fewer lithium ion batteries piling up in landfills.
Mar 7, 2019
Researchers close in on physics’ holy grail with ‘super’ breakthrough
Posted by Klaus Baldauf in categories: computing, physics
A team of scientists in the US has brought us a huge step closer to a superconductor capable of working at room temperature.
If humankind were to find a way to construct a large-scale superconductor that could work at room temperature, the way our energy grids and computers are built – and many other areas of daily life – would be fundamentally changed.
The phenomenon is the lack of electrical resistance and is observed in many materials when they are cooled below temperatures of around −180 degrees Celsius, making them rather limited in their application. However, a team from George Washington University in the US has revealed something that could help us finally reach what is one of the most sought-after achievements in modern physics.
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Mar 6, 2019
World’s First Battery-Free Bluetooth Chip Pulls Power from the Air
Posted by Quinn Sena in categories: computing, internet
“Without batteries or other high-cost components,” he continued, “tags have unlimited power and lifespan, so [they] can be embedded inside of products that were previously unconnected to the Internet of Things.”
READ MORE: This Tiny Bluetooth Chip Doesn’t Need a Battery Because It Harvests Energy From the Air [The Verge]
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Mar 6, 2019
Asteroid Research Points to Planetary Defense Issues
Posted by Caycee Dee Neely in categories: asteroid/comet impacts, computing, existential risks
Not as easy as the movies show. Say it isn’t so.
Incoming asteroids may be harder to break than scientists previously thought, finds a Johns Hopkins study that used a new understanding of rock fracture and a new computer modeling method to simulate asteroid collisions.
The findings, to be published in the March 15 print issue of Icarus, can aid in the creation of asteroid impact and deflection strategies, increase understanding of solar system formation, and help design asteroid mining efforts.
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Mar 6, 2019
Can entangled qubits be used to probe black holes?
Posted by Genevieve Klien in categories: computing, cosmology, quantum physics
Physicists have used a seven-qubit quantum computer to simulate the scrambling of information inside a black hole, heralding a future in which entangled quantum bits might be used to probe the mysterious interiors of these bizarre objects.
Mar 6, 2019
Inside the high-stakes race to make quantum computers work
Posted by Genevieve Klien in categories: computing, encryption, finance, quantum physics
Quantum computers could help explain some of the most fundamental mysteries in the universe and upend everything from finance to encryption – if only someone could get them to work.
Mar 5, 2019
Researchers harness mysterious Casimir force for tiny devices
Posted by Quinn Sena in categories: computing, quantum physics
Circa 2017
Getting something from nothing sounds like a good deal, so for years scientists have been trying to exploit the tiny amount of energy that arises when objects are brought very close together. It’s a source of energy so obscure it was once derided as a fanciful source of “perpetual motion.” Now, a research team including Princeton scientists has found a way to harness a mysterious force of repulsion, which is one aspect of that force.
This energy, predicted seven decades ago by the Dutch scientist Hendrik Casimir, arises from quantum effects and can be seen experimentally by placing two opposing plates very close to each other in a vacuum. At close range, the plates repel each other, which could be useful to certain technologies. Until recently, however, harnessing this “Casimir force” to do anything useful seemed impossible.
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