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Quantum engineering

Spins coupled to a persistent current

Nature volume 478, pages 195–196 (2011)Cite this article

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Quantum computing architectures based on hybrid systems require strong coupling and information exchange between their constituent elements. These two features have been achieved in one such hybrid setting. See Letter p.221

The development of electronic technologies based on the principles of quantum mechanics, such as quantum computing, requires coupling and integration of quantum objects of various kinds on the same electronic chip. For such integration to succeed, each object needs to be among the best in its class. On page 221 of this issue, Zhu et al.1 make progress in this direction by successfully demonstrating coupling between two quantum systems: a superconducting flux quantum bit (qubit) and an ensemble of identical, highly 'coherent' quantum spins. The authors show that the two systems exchange quanta of radiation, allowing quantum information encoded in the quanta to be reliably transferred between them. The result is relevant for quantum computing based on hybrid settings, in which the superconducting qubits would process quantum information and the spins would be used to preserve or transfer the information2.

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Figure 1: Quantum hybrid.

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Authors and Affiliations

  1. Irinel Chiorescu is in the Department of Physics and National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.,

    Irinel Chiorescu

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  1. Irinel Chiorescu
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Correspondence to Irinel Chiorescu.

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Chiorescu, I. Spins coupled to a persistent current. Nature 478, 195–196 (2011). https://doi.org/10.1038/478195a

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