(via Listening with a ‘quantum ear’ - physicsworld.com)
“Physicists are very good at making measurements with single photons of light. Soon, however, they may also be doing routine studies of single phonons – single quanta of sound. That is the claim of physicists in Sweden and Germany, who say they have detected acoustic waves that are so weak they are – almost – at the quantum limit.”
Yay for quantum acoustics!
