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Quantum physics

Andreev states taken to the next level

The Andreev bound states are a hallmark of the theory of superconducting weak links. Using the versatile Josephson effect as source, device and detector, these spin-1/2 states have been directly observed. See Letter p.312

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Figure 1: Photon-absorption spectroscopy of an Andreev bound-state doublet.


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Correspondence to Simon Gustavsson or William D. Oliver.

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Gustavsson, S., Oliver, W. Andreev states taken to the next level. Nature 499, 286–287 (2013).

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