Opening-Assisted Coherent Transport in the Deep Classical Regime
arXiv:1608.08910 · doi:10.1103/PhysRevE.95.022122
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 deep classical regime (where the decoherence rate is greater than the inter-site 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 FMO photosynthetic complex, which may be viewed as intermediate between these paradigmatic models.
21 pages, including 13 figures
References in corpus (9)
- Dephasing assisted transport: Quantum networks and biomolecules
- Environment-Assisted Quantum Transport
- Highly efficient energy excitation transfer in light-harvesting complexes: The fundamental role of noise-assisted transport
- Role of quantum coherence in chromophoric energy transport
- Efficiency of energy transfer in a light-harvesting system under quantum coherence
- Decoherence of Excitons in Multichromophore Systems: Thermal Line Broadening and Destruction of Superradiant Emission
- Non-Hermitian Hamiltonian approach to quantum transport in disordered networks with sinks: validity and effectiveness
- Design principles and fundamental trade-offs in biomimetic light harvesting
- Cooperative robustness to dephasing: single-exciton Superradiance in a nanoscale ring to model natural light-harvesting systems