Environment-assisted quantum transport

By Patrick Rebentrost, Masoud Mohseni, Ivan Kassal, Seth Lloyd, Alán Aspuru-Guzik. 2008

758 citations recorded by the source corpus.

Transport phenomena at the nanoscale are of interest due to the presence of both quantum and classical behavior. In this work, we demonstrate that quantum transport efficiency can be enhanced by a dynamical interplay of the system Hamiltonian with pure dephasing induced by a fluctuating environment. This is in contrast to fully coherent hopping that leads to localization in disordered systems, and to highly incoherent transfer that is eventually suppressed by the quantum Zeno effect. We study these phenomena in the Fenna–Matthews–Olson protein complex as a prototype for larger photosynthetic energy transfer systems. We also show that the disordered binary tree structures exhibit enhanced transport in the presence of dephasing.

Subfields: Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/0c962732ef99429776b81f14dc33d156d230b482

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In Atomic and Molecular Physics, and Optics

Citations in the corpus

Search via quantum walk (2006, background): “The marked coin can be any n × n unitary operator, for detail information we can see the literature (Shenvi et al. (2003)). The more generalized searching target on the graph can be an edge or even a subgraph (Hilley et al. (2009)).”
Limits of quantum speedup in photosynthetic light harvesting (2009, methodology): “The intuition is that at low levels dephasing allows escape from localization by removing destructive interference, but at high levels it inhibits transport by inducing the quantum Zeno effect [9, 10, 12, 13].”
Programmable quantum simulations of spin systems with trapped ions (2019, background): “However, adding temporal variations in the form of white dephasing noise in Wi(t) destroys the localization, a phenomenon known as environment-assisted quantum transport (ENAQT) (Rebentrost et al., 2009).”
Delocalized excitons in natural light-harvesting complexes (2018, methodology): “…works (Caruso et al., 2009, 2010; Chin et al., 2010; Mohseni et al., 2008; Palmieri et al., 2009; Pelzer et al., 2012; Plenio and Huelga, 2008; Rebentrost et al., 2009b,c; Sarovar et al., 2010; Skochdopole and Mazziotti, 2011) aimed at understanding the role of entanglement, quantum…”
Anderson localization of entangled photons in an integrated quantum walk (2013, background): “Besides, QWs have also been proposed to analyze energy transport in biological systems [23, 24].”
Lessons from nature about solar light harvesting. (2011, background): “Recently some theoretical studies have concluded that this situation is desirable for optimum excitation transpor”