MthGM: Can't you? I can see no possible purpose for it other than to sit cross-legged under a bo-tree contemplating it to ∞∞∞∞∞

Well when the Quantum Tunnelling Effect was first hypothesised in the early 20th century, this would have been a common reaction...."all very interesting for the navel-gazers, and some elegant maths, but what possible use could it be?...."

Fast forward 60 years or so and we have the Tunnel Diode and the Scanning Tunnelling Microscope. After 80-90 years the Tunnelling Field Effect Transistor is in development and we are making progress in the field of Quantum Conductivity, with the potential to lead to much faster computers.....