We study quantum enhancement of transport in open systems in the presence of disorder and dephasing. Quantum coherence effects may significantly enhance transport in open systems even in the semiclassical regime (where the decoherence rate is greater than the intersite hopping amplitude), as long as the disorder is sufficiently strong. When the strengths of disorder and dephasing are fixed, there is an optimal opening strength at which the coherent transport enhancement is optimized. Analytic results are obtained in two simple paradigmatic tight-binding models of large systems: the linear chain and the fully connected network. The physical behavior is also reflected in the Fenna-Matthews-Olson (FMO) photosynthetic complex, which may be viewed as intermediate between these paradigmatic models.

Zhang, Y., Celardo, G., Borgonovi, F., Kaplan, L., Opening-assisted coherent transport in the semiclassical regime, <<PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS>>, 2017; 95 (2): 022122-022134. [doi:10.1103/PhysRevE.95.022122] [http://hdl.handle.net/10807/100157]

Opening-assisted coherent transport in the semiclassical regime

Celardo, Giuseppe;Borgonovi, Fausto
Penultimo
;
2017

Abstract

We study quantum enhancement of transport in open systems in the presence of disorder and dephasing. Quantum coherence effects may significantly enhance transport in open systems even in the semiclassical regime (where the decoherence rate is greater than the intersite hopping amplitude), as long as the disorder is sufficiently strong. When the strengths of disorder and dephasing are fixed, there is an optimal opening strength at which the coherent transport enhancement is optimized. Analytic results are obtained in two simple paradigmatic tight-binding models of large systems: the linear chain and the fully connected network. The physical behavior is also reflected in the Fenna-Matthews-Olson (FMO) photosynthetic complex, which may be viewed as intermediate between these paradigmatic models.
Inglese
Zhang, Y., Celardo, G., Borgonovi, F., Kaplan, L., Opening-assisted coherent transport in the semiclassical regime, <<PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS>>, 2017; 95 (2): 022122-022134. [doi:10.1103/PhysRevE.95.022122] [http://hdl.handle.net/10807/100157]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10807/100157
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