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 (10[1])diodes to exhibit a negative differential (10[1])resistance. In a Nobel-Prize-winning device developed by Binning and Rohrer, electrons undergo this phenomenon to induce a current in a conducting microscope tip. In an alpha decay theory posited by George Gamow, (10[1])helium nuclei (10[1])undergo this phenomenon to escape Coulombic interactions, meaning there is a nonzero wavefunction outside of a finite (10[1])square well. For 10 points, (10[1])name this quantum phenomenon (10[2])where a particle passes through (10[1])a classically (10[1])forbidden barrier. ■END■