scholarly journals Coherence and decoherence in biological systems: principles of noise-assisted transport and the origin of long-lived coherences

2012 ◽  
Vol 370 (1972) ◽  
pp. 3638-3657 ◽  
Author(s):  
A. W. Chin ◽  
S. F. Huelga ◽  
M. B. Plenio
Keyword(s):  
Quantum Dynamics ◽  
Functional Role ◽  
Quantum Coherence ◽  
Biological Systems ◽  
Optimal Operation ◽  
Noisy Environments ◽  
Transport Networks ◽  
Natural Conditions ◽  
Light Harvesting Complex ◽  
Photosynthetic Complexes

The quantum dynamics of transport networks in the presence of noisy environments has recently received renewed attention with the discovery of long-lived coherences in different photosynthetic complexes. This experimental evidence has raised two fundamental questions: firstly, what are the mechanisms supporting long-lived coherences; and, secondly, how can we assess the possible functional role that the interplay of noise and quantum coherence might play in the seemingly optimal operation of biological systems under natural conditions? Here, we review recent results, illuminate them by means of two paradigmatic systems (the Fenna–Matthew–Olson complex and the light-harvesting complex LHII) and present new progress on both questions.

scholarly journals Local quantum uncertainty as a robust metric to characterize discord-like quantum correlations in subsets of the chromophores in photosynthetic light-harvesting complexes

2020 ◽  
Vol 66 (4 Jul-Aug) ◽  
pp. 525
Author(s):  
M. Chávez-Huerta ◽  
F. Rojas
Keyword(s):  
Quantum Coherence ◽  
Light Harvesting ◽  
Green Sulfur Bacteria ◽  
Quantum Correlations ◽  
Light Harvesting Complexes ◽  
Thermal Equilibrium State ◽  
Light Harvesting Complex ◽  
Quantum Uncertainty ◽  
Local Quantum Uncertainty ◽  
Local Quantum

Green sulfur bacteria is a photosynthetic organism whose light-harvesting complex accommodates a pigment-protein complex called Fenna-Matthews-Olson (FMO). The FMO complex sustains quantum coherence and quantum correlations between the electronic states of spatially separated pigment molecules as energy moves with nearly a 100% quantum efficiency to the reaction center. We present a method based on the quantum uncertainty associated to local measurements to quantify discord-like quantum correlations between two subsystems where one is a qubit and the other is a qudit. We implement the method by calculating local quantum uncertainty (LQU), concurrence, and coherence between subsystems of pure and mixed states represented by the eigenstates and by the thermal equilibrium state determined by the FMO Hamiltonian. Three partitions of the seven chromophores network define the subsystems: one chromophore with six chromophores, pairs of chromophores, and one chromophore with two chromophores. Implementation of the LQU approach allows us to characterize quantum correlations that had not been studied before, identify the most quantum correlated subsets of chromophores, and determine that, in the strongest associations of chromophores, the LQU is a monotonically increasing function of the coherence.

scholarly journals Modified Scaled Hierarchical Equation of Motion Approach for the Study of Quantum Coherence in Photosynthetic Complexes

2011 ◽  
Vol 115 (6) ◽  
pp. 1531-1537 ◽  
Author(s):  
Jing Zhu ◽  
Sabre Kais ◽  
Patrick Rebentrost ◽  
Alán Aspuru-Guzik
Keyword(s):  
Quantum Coherence ◽  
Equation Of Motion ◽  
Photosynthetic Complexes

Spontaneous Radiation and Quantum Dynamics of Biological Plasma

2015 ◽  
Vol 1084 ◽  
pp. 168-172
Author(s):  
Vladimir Lasukov ◽  
Tatiana Lasukova ◽  
Viacheslav Novoselov ◽  
Evgenia Moldovanova
Keyword(s):  
Nonlinear Diffusion ◽  
Quantum Dynamics ◽  
Biological Systems ◽  
Spontaneous Radiation ◽  
Quantum Biology ◽  
The Earth ◽  
The Universe ◽  
Quantum Solution ◽  
Dust Plasma

A quantum solution of the Fisher–Kolmogorov–Petrovskii–Piskunov equation with convection and nonlinear diffusion is obtained which can provide the basis for the quantum biology and quantum microphysics equation. On this basis, quantum emission of biological systems, separate microorganisms (cells or bacteria), and dust plasma particles is investigated. The possibility arises of creating a generator of hard photons with energy higher than. Life on the Earth will probably need relic radiation, which might promote occurrence of life in the Universe.

Long-lived quantum coherence and non-Markovianity of photosynthetic complexes

2014 ◽  
Vol 89 (4) ◽  
Author(s):  
Hong-Bin Chen ◽  
Jiun-Yi Lien ◽  
Chi-Chuan Hwang ◽  
Yueh-Nan Chen
Keyword(s):  
Quantum Coherence ◽  
Photosynthetic Complexes

Ultrafast dynamics of single molecules

2014 ◽  
Vol 43 (8) ◽  
pp. 2476-2491 ◽  
Author(s):  
Daan Brinks ◽  
Richard Hildner ◽  
Erik M. H. P. van Dijk ◽  
Fernando D. Stefani ◽  
Jana B. Nieder ◽  
...  
Keyword(s):  
Quantum Dynamics ◽  
Room Temperature ◽  
Organic Dyes ◽  
Single Molecules ◽  
Ultrafast Dynamics ◽  
Ambient Conditions ◽  
Vibrational Dynamics ◽  
Detailed Observation ◽  
Photosynthetic Complexes ◽  
And Control

Room-temperature studies of single molecules at femtosecond timescales provide detailed observation and control of ultrafast electronic and vibrational dynamics of organic dyes and photosynthetic complexes, probing quantum dynamics at ambient conditions and elucidating its role in chemistry and biology.

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