Image: Zerina Kapetanovic
Researchers from the University of Washington and Stanford University demonstrated a new radio transmitter that uses almost no power to switch the flow of electrons heated by random thermal noise on or off to an antenna. A separate cooled receiver can detect the change in temperature in the antenna of the transmitter, allowing information to be sent by the transmitter using only the power needed to activate the switch and with a power source needed to generate a signal to transmit.
Source:
