Fig. 4: Strong noise regime of the non-Hermitian QAH model. | npj Quantum Information

Fig. 4: Strong noise regime of the non-Hermitian QAH model.

From: Experimental quantum simulation of non-Hermitian dynamical topological states using stochastic Schrödinger equation

Fig. 4

a For wx = 0.1ξ0, wy = 0.05ξ0, wz = 0.45ξ0 and ξso = 0.2ξ0, the stochastically averaged spin polarization sy(k, t) presents no oscillation. b At the same noise level, sz(k, t) decays to 0 without oscillation. c Time-averaged rescaled spin textures \(\overline{{\tilde{s}}_{i}({{{\bf{k}}}})}\), with i = x, y, z. Other than small deformation, singularities (black dot) emerge on the dBIS momenta (type-I dynamical transition). d\(\overline{{\tilde{s}}_{i}({{{\bf{k}}}})}\) under stronger noise of wx = 1.6ξ0, wy = 0, wz = 0.8ξ0, and ξso = 2ξ0. The dBIS deforms drastically and connects to the topological charge at k = 0 (type-II dynamical transition).

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