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Effect of Exchange Interaction on Spin Dephasing in a Double Quantum Dot
E. A. Laird, J. R. Petta, A. C. Johnson +4
We measure singlet-triplet dephasing in a two-electron double quantum dot in the presence of an exchange interaction which can be electrically tuned from much smaller to much large…
Charge and spin manipulation in a few-electron double dot
J. R. Petta, A. C. Johnson, J. M. Taylor +5
We demonstrate high speed manipulation of a few-electron double quantum dot. In the one-electron regime, the double dot forms a charge qubit. Microwaves are used drive transitions…
Triplet-Singlet Spin Relaxation via Nuclei in a Double Quantum Dot
A. C. Johnson, J. R. Petta, J. M. Taylor +5
The spin of a confined electron, when oriented originally in some direction, will lose memory of that orientation after some time. Physical mechanisms leading to this relaxation of…