Relation between Barrier Conductance and Coulomb Blockade Peak Splitting for Tunnel-Coupled Quantum Dots

TL;DR

This paper investigates how barrier conductance influences Coulomb blockade peak splitting in tunnel-coupled quantum dots, providing theoretical solutions for different coupling regimes and aligning with experimental observations.

Contribution

It offers a theoretical analysis of peak splitting-conductance relation in coupled quantum dots, extending understanding across weak and strong coupling limits.

Findings

Qualitative agreement with experimental data

Analytical solutions for weak and strong coupling regimes

Insight into the relation between conductance and peak splitting

Abstract

We study the relation between the barrier conductance and the Coulomb blockade peak splitting for two electrostatically equivalent dots connected by tunneling channels with bandwidths much larger than the dot charging energies. We note that this problem is equivalent to a well-known single-dot problem and present solutions for the relation between peak splitting and barrier conductance in both the weak and strong coupling limits. Results are in good qualitative agreement with the experimental findings of F. R. Waugh et al.