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Coherent spin manipulation in an exchange-only qubit



E. A. Laird, Jacob Taylor, David P. DiVincenzo, C. M. Marcus, M. P. Hanson, A. C. Gossard


Initialization, manipulation and measurement of a three-spin qubit are demonstrated using a few- electron triple quantum dot, where all operations can be driven by tuning the exchange interaction. Multiplexed reflectometry, applied to two nearby charge sensors, allows for qubit readout. Deco- herence is found to be in reasonable agreement with predictions based on gate voltage noise with a uniform power spectrum. Requirements to achieve full multi-qubit control using only exchange and electrostatic interactions are outlined.
Physical Review B


Quantum dots, Spin qubit


Laird, E. , Taylor, J. , DiVincenzo, D. , Marcus, C. , Hanson, M. and Gossard, A. (2010), Coherent spin manipulation in an exchange-only qubit, Physical Review B, [online], (Accessed May 23, 2024)


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Created August 3, 2010, Updated October 12, 2021