Decoherence of two coupled singlet-triplet spin qubits
Mesoscale and Nanoscale Physics
2017-10-11 v2 Quantum Physics
Abstract
We study a pair of capacitively coupled singlet-triplet spin qubits. We characterize the two-qubit decoherence through two complementary measures, the decay time of coupled-qubit oscillations and the fidelity of entangled state preparation. We provide a quantitative map of their dependence on charge noise and field noise, and we highlight the magnetic field gradient across each singlet-triplet qubit as an effective tool to suppress decoherence due to charge noise.
Cite
@article{arxiv.1708.07539,
title = {Decoherence of two coupled singlet-triplet spin qubits},
author = {Yang-Le Wu and S. Das Sarma},
journal= {arXiv preprint arXiv:1708.07539},
year = {2017}
}
Comments
8 pages, 7 figures; published version