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News Picks : New quasiparticle found, named a dropleton

By: Physics Today
Fri Feb 28 15:00:00 UTC 2014
Scientific American: Researchers working with lasers and a gallium arsenide semiconductor created a new quasiparticle that has liquid properties; they've dubbed it a “dropleton.” Energy pulses from the laser created electron–hole pairs, called excitons, in the gallium arsenide. At a certain threshold, the electrons and holes rearranged themselves and started flowing around one another like particles in a liquid. The new particles require at least four electron–hole pairs to be stable. More a mathematical tool than an actual particle, quasiparticles such as the dropleton may help scientists better understand the quantum mechanics involved in microscopic systems of large numbers of interacting particles.

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