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Nonlocality in the excitation energy transfer in the Fenna-Matthews-Olson complex | | Charlotta Bengtson
; Michael Stenrup
; Erik Sjöqvist
; | | Date: |
27 Feb 2015 | | Abstract: | Pigment protein complexes involved in photosynthesis are remarkably efficient
in transferring excitation energy from light harvesting antenna molecules to a
reaction centre where it is converted to and stored as chemical energy. Recent
experimental and theoretical studies suggest that quantum coherence and
correlations may play a role in explaining this efficiency. We examine whether
bipartite nonlocality, a property that verifies a strong correlation between
two quantum systems, exists between different pairs of chromophore states in
the Fenna-Matthews-Olson (FMO) complex and how this is connected to the amount
of bipartite entanglement. In particular, it is tested in what way these
correlation properties are affected by different initial conditions (i.e.,
which chromophore is initially excited). When modeling the excitation energy
transfer (EET) in the FMO complex with the hierarchically coupled equations of
motions (HEOM), it is found that bipartite nonlocality indeed exists for some
pairs of chromophore states. It seems like the choice of initial condition
strongly affects for which pairs of chromophores nonlocality is found. It is
also seen that nonlocality and entanglement are two different properties in
this particular system. | | Source: | arXiv, 1502.7842 | | Services: | Forum | Review | PDF | Favorites | |
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