Taylor, J.
, Jim, M.
, Beil, J.
, Rashba, E.
, Lu, H.
, Gossard, A.
and Marcus, C.
(2013),
The Resonant Exchange Qubit, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.111.050501
(Accessed December 5, 2024)
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The Resonant Exchange Qubit
Published
Author(s)
, Medford Jim, Johannes Beil, Emmanuel Rashba, H Lu, A. C. Gossard, C. M. Marcus
Abstract
We introduce a solid-state qubit in which exchange interactions among confined electrons provide both the static longitudinal field and the oscillatory transverse field, allowing rapid and full qubit control via rf gate-voltage pulses. We demonstrate two-axis control at a detuning sweet-spot, where leakage due to hyperfine coupling is suppressed by the large exchange gap. A π/2-gate time of 2.5 ns and a coherence time of 19 μs, using multi-pulse echo, are also demonstrated. Model calculations that include effects of hyperfine noise are in excellent quantitative agreement with experiment.Citation
Physical Review Letters
Pub Type
Journals
Download Paper
Keywords
Quantum dots, quantum computing
Citation
Issues
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Created July 31, 2013, Updated November 10, 2018