Life after charge noise: Recent results with transmon qubits

A. A. Houck, Jens Koch, M. H. Devoret, S. M. Girvin, R. J. Schoelkopf

Research output: Contribution to journalArticlepeer-review

79 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)105-115
Number of pages11
JournalQuantum Information Processing
Issue number2-3
StatePublished - Jun 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Statistical and Nonlinear Physics
  • Theoretical Computer Science
  • Signal Processing
  • Modeling and Simulation
  • Electrical and Electronic Engineering


  • Quantum computation
  • Superconducting qubits
  • Transmon


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