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Petit, L. (author), Boter, J.M. (author), Eenink, H.G.J. (author), Droulers, G. (author), Tagliaferri, M.L.V. (author), Li, R. (author), Franke, D.P. (author), Singh, K. J. (author), Clarke, J. S. (author), Schouten, R.N. (author), Dobrovitski, V.V. (author), Vandersypen, L.M.K. (author), Veldhorst, M. (author)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...journal article 2018
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Li, R. (author), Petit, L. (author), Franke, D.P. (author), Dehollain Lorenzana, J.P. (author), Helsen, J. (author), Steudtner, M. (author), Thomas, Nicole K. (author), Wehner, S.D.C. (author), Vandersypen, L.M.K. (author), Veldhorst, M. (author)The spin states of single electrons in gate-defined quantum dots satisfy crucial requirements for a practical quantum computer. These include extremely long coherence times, high-fidelity quantum operation, and the ability to shuttle electrons as a mechanism for on-chip flying qubits. To increase the number of qubits to the thousands or...journal article 2018