description Anderson localization Overview
Anderson localization is the suppression of wave propagation caused by disorder in a medium, named after physicist Philip W. Anderson. In an electronic system, repeated interference between waves scattered by randomly distributed imperfections can produce spatially localized quantum states, preventing ordinary diffusion even without classical confinement. The concept also applies to other waves, including light, sound, and matter waves, and is fundamental to the study of transport in disordered systems.
help Anderson localization FAQ
Who discovered Anderson localization?
Anderson localization is named after physicist Philip W. Anderson, who published his theory on the absence of diffusion in certain random lattices in 1958. His groundbreaking work in solid-state physics contributed to him winning the Nobel Prize in Physics in 1977.
How does disorder in a material cause Anderson localization?
In a highly disordered system, such as an impure crystal, the random scattering of waves causes them to destructively interfere with one another. This interference completely halts the transport of energy or particles, trapping them in localized regions.
Can Anderson localization happen with light or sound?
Yes, while originally formulated for electrons in disordered conductors, Anderson localization is a fundamental wave phenomenon. Physicists have successfully demonstrated the effect using classical waves like light, microwaves, and even sound waves in heavily scattered media.
What is the difference between localization and traditional trapping?
Traditional trapping of a particle requires an external potential barrier, like a physical magnetic or electric box, to hold it in place. Anderson localization occurs purely from the wave nature of the particle interfering with itself due to structural disorder, requiring no external walls.
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