To calculate a current named for this phenomenon, John Bardeen used a time-dependent perturbation in his transfer Hamiltonian method. Fowler and Nordheim modeled field emission using this phenomenon, which causes Esaki diodes (10[1])to exhibit (10[1])a negative differential resistance. In a Nobel-Prize-winning device developed by Binning and Rohrer, electrons undergo this phenomenon (10[1])to induce a current in a conducting microscope tip. In an alpha decay theory posited by George (10[2])Gamow, helium nuclei undergo this phenomenon to escape Coulombic interactions, (10[2])meaning there is a nonzero wavefunction outside of a finite square well. For 10 points, (10[1])name this quantum phenomenon where a (10[1])particle passes through a classically (10[1])forbidden barrier. ■END■