Testing quantum speedups in exciton transport through a photosynthetic complex using quantum stochastic walks
Naini Dudhe, Pratyush Kumar Sahoo, Colin Benjamin
Abstract
vibronic processes to photosynthesis. Regardless of the origin, there has been a debate on whether quantum coherence results in any speedup of the exciton transport process. To address this we model exciton transport in FMO using a quantum stochastic walk (QSW) with only incoherence, pure dephasing and with both dephasing and incoherence. We find that the QSW model with pure dephasing leads to a substantial speedup in exciton transport as compared to a QSW model which includes both dephasing and incoherence and one which includes only incoherence, both of which experience slowdowns.
Topics & Concepts
DephasingCoherence (philosophical gambling strategy)ExcitonQuantumPhotonQuantum decoherenceQuantum walkSpeedupPhysicsStatistical physicsQuantum master equationQuantum mechanicsQuantum computerMaster equationComputer scienceOperating systemSpectroscopy and Quantum Chemical StudiesPhotosynthetic Processes and MechanismsAdvanced Chemical Physics Studies