Enhanced quantum entanglement in the non-Markovian dynamics of biomolecular excitons

By M. Thorwart, J. Eckel, John H. Reina, P. Nalbach, S. Weiss. 2008

159 citations recorded by the source corpus.

We show that quantum coherence of biomolecular excitons is maintained over exceedingly long times due to the constructive role of their non-Markovian protein-solvent environment. Using a numerically exact approach, we demonstrate that a slow quantum bath helps to sustain quantum entanglement of two pairs of Forster coupled excitons, in contrast to a Markovian environment. We consider the cross-over from a fast to a slow bath and from weak to strong dissipation and show that a slow bath can generate robust entanglement. This persists to surprisingly high temperatures, even higher than the excitonic gap and is absent for a Markovian bath.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Cellular and Molecular Neuroscience

View Paper: https://www.semanticscholar.org/paper/65dee00c238849962b28594c1e0a96b64e2f647c

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

In Cellular and Molecular Neuroscience

Citations in the corpus

Modelling of oscillations in two-dimensional echo-spectra of the Fenna–Matthews–Olson complex (2011, background): “One possible explanation for the persistence of long coherence times has been the sluggish absorption of the reorganisation energy by the molecule, which requires theoretical descriptions that go beyond the Markovian approximation and the rotating wave approximation [18].”
Quantum channels and memory effects (2012, background): “…et al., 2011; Vats, John and Busch, 2002), and in the soft matter framework as the case of exciton dynamics surrounded by their protein environment (Caruso et al., 2009; Caruso, Huelga and Plenio, 2010; Plenio and Huelga, 2008; Rebentrost, Chakraborty and Aspuru-Guzik, 2009; Thorwart et al., 2009).”
Vibrations, quanta and biology (2013, background): “g.[166]) and their scaling to larger systems, just as for the transformation approach to be discussed below, remains to be demonstrated.”