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CIRCUIT QED

Designing nonlinearity

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Qubits cannot exist without nonlinearity, but nonlinear elements in superconducting circuits lead to losses. A superconducting qubit has now been realized by nonlinearly coupling two microwave resonators, offering the promise of long coherence times.

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Fig. 1: Superconducting qubit design.

References

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Authors and Affiliations

  1. Institute for Experimental Physics, University of Innsbruck, Innsbruck, Austria

    Gerhard Kirchmair

  2. Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, Innsbruck, Austria

    Gerhard Kirchmair

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  1. Gerhard Kirchmair
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Correspondence to Gerhard Kirchmair.

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Kirchmair, G. Designing nonlinearity. Nat. Phys. 16, 127–128 (2020). https://doi.org/10.1038/s41567-019-0710-6

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