Optimizing excitation transport in quantum networks is an important precur-sor to the development of highly-efficient light-harvesting devices. We investigate thephenomenon of dephasing-assisted leakage from trapped states, which may ensure effi-cient transport of excitations across a network. We consider three small networks withknown trapped states and study the effect of Markovian quantum noise and classicalnoise sources with different correlation times, from very low frequency non-Markoviannoise to white noise. We show that the excitation - otherwise stalled in trapped states -is able to diffuse rapidly through the networks from a source to a sink, with efficiencybeing generally maximized for intermediate correlation times.

Noise-induced detrapping in small quantum networks

PALADINO, ELISABETTA;FALCI, Giuseppe
2015

Abstract

Optimizing excitation transport in quantum networks is an important precur-sor to the development of highly-efficient light-harvesting devices. We investigate thephenomenon of dephasing-assisted leakage from trapped states, which may ensure effi-cient transport of excitations across a network. We consider three small networks withknown trapped states and study the effect of Markovian quantum noise and classicalnoise sources with different correlation times, from very low frequency non-Markoviannoise to white noise. We show that the excitation - otherwise stalled in trapped states -is able to diffuse rapidly through the networks from a source to a sink, with efficiencybeing generally maximized for intermediate correlation times.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11769/18673
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