Abstract

In 1958, P. W. Anderson predicted the exponential localization¹ of electronic wave functions in disordered solids, and the resulting absence of diffusion. It has been realized later that Anderson localization is ubiquitous in wave physics² as it originates from the interference between multiple scattering paths, and this has prompted an intense activity to observe it with light waves, microwaves, sound waves, and electron gases, but there was no direct observation of exponential spatial localization of matter-waves (electrons or others).

© 2009 IEEE