Coherent Electron Flow

Coherent flow of electrons through a quantum point contact formed in a two-dimensional electron gas inside a GaAs/AlGaAs heterostructure. Robert Westervelt and Eric Heller, Harvard University and Arthur C. Gossard, UC Santa Barbara, Physics Today, 56 N 12 (2003).

Reprinted with permission from Physics Today. Copyright 2003, American Institute of Physics.