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An exceptional mass dance

Encircling a so-called exceptional point in parameter space elicits a topological response in an open system. An experiment now demonstrates topologically robust chiral spin transfer in a sea of ultracold fermions.

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Fig. 1: Chiral spin transfer from encircling of an exceptional point.


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Correspondence to Wei Yi.

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Yi, W. An exceptional mass dance. Nat. Phys. 18, 370–371 (2022).

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