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Mathematical physics

Circling exceptional points

Going around an exceptional point in a full circle can be a non-adiabatic, asymmetric process. This surprising prediction is now confirmed by two separate experiments.

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Figure 1: Dynamically encircling an exceptional point is a non-adiabatic process.
Figure 2: The transfer efficiency as a function of loop time.


  1. Doppler, J. et al. Nature (2016).

  2. Xu, H. et al. Nature (2016).

  3. Milburn, T. J. et al. Phys. Rev. A 92, 052124 (2015).

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Correspondence to Dieter Heiss.

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Heiss, D. Circling exceptional points. Nature Phys 12, 823–824 (2016).

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