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The Resonant Exchange Qubit by Medford, J.; Beil, J.; Taylor, J. M.; Rashba, E. I.; Lu, H.; Gossard, A. C.; Marcus, C. M. is a scholarly article available to read on EtoBox.

What is The Resonant Exchange Qubit about?

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 {\pi}/2-gate time of 2.5 ns and a coherence time of 19 {\mu}s, using multi-pulse echo, are also demonstrated. Model calculations that include effects of hyperfine noise are in excellent quantitative agreement with experiment.

Author

Medford, J.; Beil, J.; Taylor, J. M.; Rashba, E. I.; Lu, H.; Gossard, A. C.; Marcus, C. M.

Published

2013

Language

EN