Quantum dephasing in a gated GaAs triple quantum dot due to nonergodic noise
Mesoscale and Nanoscale Physics
2016-01-28 v2
Abstract
We extract the phase coherence of a qubit defined by singlet and triplet electronic states in a gated GaAs triple quantum dot, measuring on timescales much shorter than the decorrelation time of the environmental noise. In this non-ergodic regime, we observe that the coherence is boosted and several dephasing times emerge, depending on how the phase stability is extracted. We elucidate their mutual relations, and demonstrate that they reflect the noise short-time dynamics.
Keywords
Cite
@article{arxiv.1512.08832,
title = {Quantum dephasing in a gated GaAs triple quantum dot due to nonergodic noise},
author = {M. R. Delbecq and T. Nakajima and P. Stano and T. Otsuka and S. Amaha and J. Yoneda and K. Takeda and G. Allison and A. Ludwig and A. D. Wieck and S. Tarucha},
journal= {arXiv preprint arXiv:1512.08832},
year = {2016}
}
Comments
revised version. main text: 5 pages, 4 figures; supplementary material: 8 pages, 4 figures