Fractional winding numbers in open quantum systems recover integer quantization over multiple momentum periods.
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A dissipative anisotropic Yao-Lee model is exactly solvable via non-Hermitian fermionic mapping, hosting a large manifold of non-equilibrium steady states and a PT symmetry breaking transition with an exceptional ring in the Liouvillian spectrum.
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Fractional topology and multi-period re-quantization in open quantum systems
Fractional winding numbers in open quantum systems recover integer quantization over multiple momentum periods.
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Dissipative Yao-Lee Spin-Orbital Model: Exact Solvability and $\mathcal{PT}$ Symmetry Breaking
A dissipative anisotropic Yao-Lee model is exactly solvable via non-Hermitian fermionic mapping, hosting a large manifold of non-equilibrium steady states and a PT symmetry breaking transition with an exceptional ring in the Liouvillian spectrum.