FTP, name this effect, also called barrier penetration, in which a particle travels through a potential barrier to the other side, even though the presence of the particle within that barrier is forbidden by classical physics.
A major idea behind the Coleman-De Luccia instanton, this process allows matter to go from a "false vacuum" state to a "true vacuum" state. Also responsible for the non-classical behavior of the Josephson junction, in which a thin electrically insulating film is sandwiched between two pieces of superconductor, in 1928 this quantum effect was shown by Condon, Gamow, and Gurney to be responsible for the emission of alpha particles. FTP, name this effect, also called barrier penetration, in which a particle travels through a potential barrier to the other side, even though the presence of the particle within that barrier is forbidden by classical physics.
A major idea behind the Coleman-De Luccia instanton, this process allows matter to go from a "false vacuum" state to a "true vacuum" state.
quantum {tunnelling} (prompt on “barrier penetration”)