"We exploit quantum tunneling in many applications..." Just out of interest, I use the extremely fast switching times of tunnel diodes to make quick determinat

"We exploit quantum tunneling in many applications..." Just out of interest, I use the extremely fast switching times of tunnel diodes to make quick determinations of oscilloscope rise-times. When used as a switch their rise-times are much faster than most oscilloscopes so the rise-time seen on the oscilloscope is actually that of the scope itself.