Transition between Quantum States in a Parallel-Coupled Double-Quantum-Dot
介观与纳米尺度物理
2009-11-10 v1 强关联电子
量子物理
摘要
Strong electron and spin correlations in a double-quantum-dot (DQD) can give rise to different quantum states. We observe a continuous transition from a Kondo state exhibiting a single-peak Kondo resonance to another exhibiting a double peak by increasing the inter-dot-coupling (t) in a parallel-coupled DQD. The transition into the double-peak state provides evidence for spin-entanglement between the excess-electron on each dot. Toward the transition, the peak splitting merges and becomes substantially smaller than t because of strong Coulomb effects. Our device tunability bodes well for future quantum computation applications.
引用
@article{arxiv.cond-mat/0305289,
title = {Transition between Quantum States in a Parallel-Coupled Double-Quantum-Dot},
author = {J. C. Chen and A. M. Chang and M. R. Melloch},
journal= {arXiv preprint arXiv:cond-mat/0305289},
year = {2009}
}
备注
5 pages, 4 figures