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PUBLICATIONS

The Resonant Exchange Qubit

Published

Author(s)

Jacob M. Taylor, 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

https://doi.org/10.1103/PhysRevLett.111.050501

Keywords

Quantum dots, quantum computing
Magnetoelectronics, Magnetics and Quantum information science

Citation

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 October 24, 2025)

Issues

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Created July 31, 2013, Updated November 10, 2018
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