Abstract
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.
Original language | English |
---|---|
Article number | 076801 |
Pages (from-to) | 1-5 |
Journal | Physical Review Letters |
Volume | 121 |
Issue number | 7 |
DOIs | |
Publication status | Published - 14 Aug 2018 |