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Quantum

Quantum

Ultracold atoms permit direct observation of quasiparticle dynamics

18 Mar 2021 Oliver Stockdale 
Diagram showing an impurity atom evolving into a quasiparticle over time (represented by a clock)
Analogue interaction Illustration of how an impurity atom may gradually evolve into a quasiparticle by interacting with a surrounding medium. This mechanism is similar to how an electron can distort a crystal lattice when it moves through a solid, as shown in the inset. (Courtesy: CCQ, Aarhus University)
Theories of how quasiparticles form have been around for more than 80 years, but direct observations

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Oliver Stockdale is a PhD student contributor to Physics World. Oliver studies quantum physics at the Kirchhoff-Institut für Physik, Universität Heidelberg. Find out more about our student contributor networks
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