Physicists generate electrical currents from noise
![Electron micrograph showing the two quantum dots in the energy-harvesting device](http://images.iop.org/objects/phw/news/thumb/19/4/18/PW-2015-04-21-Kornei-dot.jpg)
Two quantum dots have been used to generate an electrical current from voltage noise. The device was created by physicists in Germany, who say that it could lead to the development of systems that convert waste heat into useful energy.
...
Read more »