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Non-Markovianity between Site Pairs in FMO Complex Using Discrete-Time Quantum Jump Model.

Mousumi Kundu1, C M Chandrashekar2,3,4

  • 1Indian Institute of Science Education and Research, Berhampur760010, India.

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The Fenna-Mathews-Olson complex uses quantum effects for efficient energy transfer. This study quantifies non-Markovian memory effects, linking them to enhanced transport efficiency in green sulfur bacteria.

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Area of Science:

  • Quantum biology
  • Biophysics
  • Photosynthesis research

Background:

  • The Fenna-Mathews-Olson (FMO) complex facilitates energy transfer in green sulfur bacteria.
  • Its high efficiency is crucial for light-harvesting and reaction centers.
  • Quantum phenomena like wavelike behavior and non-Markovian quantum jumps are proposed to enhance this efficiency.

Purpose of the Study:

  • To investigate the role of quantum dynamics in FMO complex energy transfer.
  • To simulate and quantify non-Markovian effects in the FMO system.
  • To explore the connection between quantum coherence and transport efficiency.

Main Methods:

  • Discrete quantum jump model simulation.
  • Analysis of quantum-classical dynamics within the FMO complex.
  • Quantification of non-Markovian memory effects in specific site pairs.

Main Results:

  • Demonstrated and quantified higher non-Markovian memory effects in FMO complex.
  • Identified specific site pairs exhibiting these effects.
  • Found a correlation between non-Markovianity and enhanced energy transport.

Conclusions:

  • Non-Markovian quantum jumps play a significant role in enhancing energy transport efficiency.
  • Environmental and internal factors favoring faster transport also promote non-Markovianity.
  • Understanding these quantum effects is key for future bio-inspired energy technologies.