Spin Lifetime and Charge Noise in Hot Silicon Quantum Dot Qubits.
Spin Lifetime and Charge Noise in Hot Silicon Quantum Dot Qubits.
复制标题
DOI:
10.1103/physrevlett.121.076801
复制
发表时间:
2018-03
影响因子:
8.6
通讯作者:
L. Petit;J. Boter;H. Eenink;G. Droulers;M. Tagliaferri;R. Li;D. P. Franke;K. Singh;J. Clarke;R. Schouten;V. Dobrovitski;L. Vandersypen;M. Veldhorst
中科院分区:
文献类型:
--
作者:
L. Petit;J. Boter;H. Eenink;G. Droulers;M. Tagliaferri;R. Li;D. P. Franke;K. Singh;J. Clarke;R. Schouten;V. Dobrovitski;L. Vandersypen;M. Veldhorst
We investigate the magnetic field and temperature dependence of the single-electron spin lifetime in silicon quantum dots and find a lifetime of 2.8 ms at a temperature of 1.1 K. We develop a model based on spin-valley mixing and find that Johnson noise and two-phonon processes limit relaxation at low and high temperature, respectively. We also investigate the effect of temperature on charge noise and find a linear dependence up to 4 K. These results contribute to the understanding of relaxation in silicon quantum dots and are promising for qubit operation at elevated temperatures.