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, (10[1])which (-5[1])causes Esaki (10[2])diodes (10[1])to (10[1])exhibit (10[2])a negative differential (10[5])resistance. (10[1])In a Nobel-Prize-winning device developed by Binning (10[1])and Rohrer, (-5[1])electrons undergo this phenomenon (10[4])to induce a current (10[3])in a conducting microscope tip. (10[1])In an (10[1])alpha (10[1])decay (10[1])theory (10[1])posited by (10[1])George (10[3])Gamow, (10[2])helium nuclei (10[1])undergo (10[1])this phenomenon to escape (-5[1])Coulombic (-5[1])interactions, (10[4])meaning there is a nonzero wavefunction outside of a (10[1])finite (10[1])square (10[1])well. (10[1])For 10 points, (10[3])name this (10[1])quantum (10[2])phenomenon (10[3])where a (10[1])particle passes (10[2])through (10[2])a classically (10[5])forbidden (10[3])barrier. (10[1])■END■ (10[3])