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Where two quantum fluids meet

Josephson vortices are observed at the boundary between two exciton-polariton condensates, with lasers used to create the required local phase twist. The finding opens new opportunities for exploring fundamental physics and engineering novel quantum devices.

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Fig. 1: Two resonant phase-controlling lasers (red and blue) locally imprint phase on two exciton-polariton condensates with a phase difference of π.


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Correspondence to Na Young Kim.

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Yoon, T., Kim, N.Y. Where two quantum fluids meet. Nat. Photonics 13, 441–442 (2019).

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