Entangled quantum circuits

ETH Zurich researchers have succeeded in demonstrating that quantum mechanical objects that are far apart can be much more strongly correlated with each other than is possible in conventional systems. For this experiment, they used superconducting circuits for the first time.

Part of the quantum connection in a long corridor, dipped in bluish light.
Partial section of the 30-metre-long quantum connection between two superconducting circuits. The vacuum tube (centre) contains a microwave waveguide that is cooled to around –273°C and connects the two quantum circuits. (Photograph: ETH Zurich / Daniel Winkler)
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