We review the main theoretical and experimental results for the transmon, a superconducting charge qubit derived from the Cooper pair box. The increased ratio of the Josephson to charging energy results in an exponential suppression of the transmon's sensitivity to 1/f charge noise. This has been observed experimentally and yields homogeneous broadening, negligible pure dephasing, and long coherence times of up to 3 μs. Anharmonicity of the energy spectrum is required for qubit operation, and has been proven to be sufficient in transmon devices. Transmons have been implemented in a wide array of experiments, demonstrating consistent and reproducible results in very good agreement with theory. © 2009 Springer Science+Business Media, LLC.
CITATION STYLE
Houck, A. A., Koch, J., Devoret, M. H., Girvin, S. M., & Schoelkopf, R. J. (2009). Life after charge noise: Recent results with transmon qubits. Quantum Information Processing, 8(2–3), 105–115. https://doi.org/10.1007/s11128-009-0100-6
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