Ping Xiang, Marina Litinskaya, Evgeny A. Shapiro, Roman V. Krems
An elementary excitation in an aggregate of coupled particles generates a collective excited state. We show that the dynamics of these excitations can be controlled by applying an instantaneous external potential that modifies the quantum phase of individual particles. We show that specific phase transformations can be used to accelerate or decelerate quantum energy transport and spatially focus delocalized excitations onto different parts of ordered arrays of quantum particles.
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http://arxiv.org/abs/1209.5327
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