If you've balanced a laptop computer on your lap lately, you probably noticed a burning sensation. That's because ever-increasing processing speeds are creating more and more heat, which has to go somewhere — in this case, into your lap.
Two researchers at the University of Virginia's School of Engineering and Applied Science aim to lay the scientific groundwork that will solve the problem using nanoelectronics, considered the essential science for powering the next generation of computers.
"Laptops are very hot now, so hot that they are not 'lap' tops anymore," said Avik Ghosh, an assistant professor in the Charles L. Brown Department of Electrical and Computer Engineering. “The prediction is that if we continue at our current pace of miniaturization, these devices will be as hot as the sun in 10 to 20 years."
To head off this problem, Ghosh and Mircea Stan, also a professor in the department, are re-examining nothing less than the Second Law of Thermodynamics. The law states that, left to itself, heat will transfer from a hotter unit to a cooler one — in this case between electrical computer components — until both have roughly the same temperature, a state called "thermal equilibrium."
The possibility of breaking the law will require Ghosh and Stan to solve a scientifically controversial — and theoretical — conundrum known as "Maxwell's Demon."
Introduced by Scottish physicist James Clerk Maxwell in 1871, the concept theorizes that the energy flow from hot to cold could be disrupted if there were a way to control the transfer of energy between two units. Maxwell's Demon would allow one component to take the heat while the other worked at a lower temperature.
This could be accomplished only if the degree of natural disorder, or entropy, were reduced. And that's the "demon" in Maxwell's Demon. "Device engineering is typically based on operating near thermal equilibrium," Ghosh said.
But, he added, nature has examples of biological cells that operate outside thermal equilibrium.
"Chlorophyll, for example, can convert photons into energy in highly efficient ways that seem to violate traditional thermodynamic expectations," he said.
A closely related concept, Brownian "ratchets," will also be explored. This concept proposes that devices could be engineered to convert non-equilibrium electrical activity into directed motion, allowing energy to be harvested from a heat source.
If computers could be made with components that operate outside thermal equilibrium, it could mean better computer performance. Basically, your laptop wouldn't burst into flames as it processes larger amounts of information at faster speeds. Also, because it would operate at extremely low power levels and would have the ability to harness, or scavenge, power dissipated by other functions, battery life would increase.
Combining Ghosh's command of physics with Stan's expertise in electrical engineering, the two hope to bridge the concept of tackling Maxwell's Demon and Brownian ratchets from theoretical physics to engineered technologies.
"These theories have been looked at from a physics perspective for years, but not from the perspective of electrical engineering," Stan said. "So that's where we are trying to break some ground."
Fariss Samarrai | Newswise Science News
Battery research at Graz University of Technology: new breakthroughs in research on super-batteries
25.04.2019 | Technische Universität Graz
Energy-saving new LED phosphor
24.04.2019 | Universität Innsbruck
Flexible, organic and printed electronics conquer everyday life. The forecasts for growth promise increasing markets and opportunities for the industry. In Europe, top institutions and companies are engaged in research and further development of these technologies for tomorrow's markets and applications. However, access by SMEs is difficult. The European project SmartEEs - Smart Emerging Electronics Servicing works on the establishment of a European innovation network, which supports both the access to competences as well as the support of the enterprises with the assumption of innovations and the progress up to the commercialization.
It surrounds us and almost unconsciously accompanies us through everyday life - printed electronics. It starts with smart labels or RFID tags in clothing, we...
The human eye is particularly sensitive to green, but less sensitive to blue and red. Chemists led by Hubert Huppertz at the University of Innsbruck have now developed a new red phosphor whose light is well perceived by the eye. This increases the light yield of white LEDs by around one sixth, which can significantly improve the energy efficiency of lighting systems.
Light emitting diodes or LEDs are only able to produce light of a certain colour. However, white light can be created using different colour mixing processes.
Researchers led by Francesca Ferlaino from the University of Innsbruck and the Austrian Academy of Sciences report in Physical Review X on the observation of supersolid behavior in dipolar quantum gases of erbium and dysprosium. In the dysprosium gas these properties are unprecedentedly long-lived. This sets the stage for future investigations into the nature of this exotic phase of matter.
Supersolidity is a paradoxical state where the matter is both crystallized and superfluid. Predicted 50 years ago, such a counter-intuitive phase, featuring...
A stellar flare 10 times more powerful than anything seen on our sun has burst from an ultracool star almost the same size as Jupiter
A localization phenomenon boosts the accuracy of solving quantum many-body problems with quantum computers which are otherwise challenging for conventional computers. This brings such digital quantum simulation within reach on quantum devices available today.
Quantum computers promise to solve certain computational problems exponentially faster than any classical machine. “A particularly promising application is the...
17.04.2019 | Event News
15.04.2019 | Event News
09.04.2019 | Event News
25.04.2019 | Materials Sciences
25.04.2019 | Earth Sciences
25.04.2019 | Life Sciences