Non-reciprocal topologically-protected time evolution in driven dissipative spin systems is discovered.
Significance and Impact
Our findings enable a high-efficiency spin-filter device based on parametric driving around non-Hermitian spectral degeneracies.
- Developed a theory of the non-Hermitian spin dynamics in spin-torque-driven dissipative spin systems.
- Predicted non-reciprocal time evolution by encircling an exceptional point in configuration space.
- Determined optimal protocol parameters for a high-efficiency asymmetric spin-filter effect.
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