For 10 points, name this classically forbidden process in which a particle passes through a potential energy barrier without the energy to do so.
An experiment by Judith Klinman at UC Berkeley in the 1980s investigated the role of this process in mediating the catalytic function of alcohol dehydrogenase. At low temperatures, this process exhibits a minor effect for protons in the Grotthuss mechanism. This process also mediates the transfer of current in the SIS type of Josephson junction. One device based on this process is a type of (*) high resolution microscope designed by Binnig and Rohrer. The role of this phenomenon in mediating alpha decay was elucidated by George Gamow, who also calculated the probability of this process occurring with the WKB approximation. For 10 points, name this classically forbidden process in which a particle passes through a potential energy barrier without the energy to do so.
An experiment by Judith Klinman at UC Berkeley in the 1980s investigated the role of this process in mediating the catalytic function of alcohol dehydrogenase.
quantum tunneling [or quantum mechanical tunneling or Scanning-Tunneling microscope] 