Dynamically encircling an exceptional point for asymmetric mode switching

@article{Doppler2016DynamicallyEA,
  title={Dynamically encircling an exceptional point for asymmetric mode switching},
  author={J{\"o}rg Doppler and A. A. Mailybaev and Julian Boehm and U. Kuhl and Adrian Girschik and Florian Libisch and Thomas J. Milburn and Peter Rabl and Nimrod Moiseyev and Stefan Rotter},
  journal={Nature},
  year={2016},
  volume={537},
  pages={76-79}
}
Physical systems with loss or gain have resonant modes that decay or grow exponentially with time. Whenever two such modes coalesce both in their resonant frequency and their rate of decay or growth, an ‘exceptional point’ occurs, giving rise to fascinating phenomena that defy our physical intuition. Particularly intriguing behaviour is predicted to appear when an exceptional point is encircled sufficiently slowly, such as a state-flip or the accumulation of a geometric phase. The topological… CONTINUE READING
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