Excitation decay in one-dimensional disordered systems with paired traps

TL;DR

This study investigates how pairing traps in one-dimensional disordered lattices affect excitation decay, revealing that pairing slows decay rates due to larger trap-free segments, with implications for understanding transport in disordered systems.

Contribution

It demonstrates that pairing traps in disordered lattices slow excitation decay, highlighting the role of trap configuration on transport dynamics.

Findings

Pairing traps causes slower decay of excitation survival probability.

Lattices with paired traps have larger trap-free segments.

Pairing results in less disruption of excitation dynamics.

Abstract

Incoherent transport of excitations in one-dimensional disordered lattices with pairs of traps placed at random is studied by numerically solving the corresponding master equation. Results are compared to the case of lattices with the same concentration of unpaired traps, and it is found that pairing of traps causes a slowdown of the decay rate of both the mean square displacement and the survival probability of excitations. We suggest that this result is due to the presence of larger trap-free segments in the lattices with paired disorder, which implies that pairing of traps causes less disruption on the dynamics of excitations. In the conclusion we discuss the implications of our work, placing it in a more general context.