Numerical Evidence for Robustness of Environment-Assisted Quantum Transport

TL;DR

This study provides numerical evidence that environment-assisted quantum transport (ENAQT) remains robust across various environmental and system parameters in photosynthetic complexes, supporting its potential for designing efficient quantum systems.

Contribution

The paper demonstrates through simulations that ENAQT is resilient to multiple variations in system and environmental parameters, highlighting its applicability in robust quantum transport design.

Findings

ENAQT is robust to changes in reorganization energy, bath frequency cutoff, and temperature.

ENAQT persists despite variations in initial excitations, dissipation, and disorder.

The results support using ENAQT principles in designing efficient quantum transport systems.

Abstract

Recent theoretical studies show that decoherence process can enhance transport efficiency in quantum systems. This effect is known as environment-assisted quantum transport (ENAQT). The role of ENAQT in optimal quantum transport is well investigated, however, it is less known how robust ENAQT is with respect to variations in the system or its environment characteristic. Toward answering this question, we simulated excitonic energy transfer in Fenna-Matthews-Olson (FMO) photosynthetic complex. We found that ENAQT is robust with respect to many relevant parameters of environmental interactions and Frenkel-exciton Hamiltonian including reorganization energy, bath frequency cutoff, temperature, and initial excitations, dissipation rate, trapping rate, disorders, and dipole moments orientations. Our study suggests that the ENAQT phenomenon can be exploited in robust design of highly efficient quantum transport systems.