Quantum correlation dynamics in photosynthetic processes assisted by molecular vibrations
arXiv:1501.07710 · doi:10.1016/j.aop.2015.06.002
Abstract
During the long course of evolution, nature has learnt how to exploit quantum effects. In fact, recent experiments reveal the existence of quantum processes whose coherence extends over unexpectedly long time and space ranges. In particular, photosynthetic processes in light-harvesting complexes display a typical oscillatory dynamics ascribed to quantum coherence. Here, we consider the simple model where a dimer made of two chromophores is strongly coupled with a quasi-resonant vibrational mode. We observe the occurrence of wide oscillations of genuine quantum correlations, between electronic excitations and the environment, represented by vibrational bosonic modes. Such a quantum dynamics has been unveiled through the calculation of the negativity of entanglement and the discord, indicators widely used in quantum information for quantifying the resources needed to realize quantum technologies. We also discuss the possibility of approximating additional weakly-coupled off-resonant vibrational modes, simulating the disturbances induced by the rest of the environment, by a single vibrational mode. Within this approximation, one can show that the off-resonant bath behaves like a classical source of noise.
References in corpus (28)
- Quantum entanglement
- A computable measure of entanglement
- Introducing Quantum Discord
- Distributed Entanglement
- Classical, quantum and total correlations
- The classical-quantum boundary for correlations: discord and related measures
- Environment-Assisted Quantum Walks in Photosynthetic Energy Transfer
- Long-lived quantum coherence in photosynthetic complexes at physiological temperature
- 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
- Quantum entanglement in photosynthetic light harvesting complexes
- Sustained Quantum Coherence and Entanglement in the Avian Compass
- Efficiency of energy transfer in a light-harvesting system under quantum coherence
- Non-classicality of the molecular vibrations assisting exciton energy transfer at room temperature
- Entanglement and entangling power of the dynamics in light-harvesting complexes
- Efficient energy transfer in light-harvesting systems, I: optimal temperature, reorganization energy, and spatial-temporal correlations
- Enhanced quantum entanglement in the non-Markovian dynamics of biomolecular excitons
- Entanglement of Formation of Bipartite Quantum States
- Modified-scaled hierarchical equation of motion approach for the study of quantum coherence in photosynthetic complexes
- Distribution of entanglement in light-harvesting complexes and their quantum efficiency
- On the Equivalence of Quantum and Classical Coherence in Electronic Energy Transfer
- Exploiting structured environments for efficient energy transfer: The phonon antenna mechanism
- Non-classicality criteria from phase-space representations and information-theoretical constraints are maximally inequivalent
- Could light harvesting complexes exhibit non-classical effects at room temperature?
- Multipartite Quantum Entanglement Evolution in Photosynthetic Complexes
- Bipartite entanglement of quantum states in a pair basis
- On the discrimination between classical and quantum states