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arXiv · 2306.10000

Loss-induced universal one-way transport in periodically driven systems

Chang Shu·Kai Zhang·Kai Sun
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Abstract

In this paper, we show that a periodically driven Aubry-Andr\'e-Harper model with imbalanced on-site gain/loss supports universal one-way transport that is immune to impurities and independent of initial excitations. We reveal the underlying mechanism that the periodic driving gives rise to the non-Hermitian skin effect in the effective Floquet Hamiltonian, thereby causing universal non-reciprocal transport. Additionally, we probe the time-average decay rate of the propagator under long-time bulk dynamics as a signature of the Floquet emergent non-Hermitian skin effect. Our results provide a feasible and controllable way to realize universal one-way transport that is easily accessible to experiments.

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Chang Shu, Kai Zhang, Kai Sun. 2023-06-16. Loss-induced universal one-way transport in periodically driven systems. https://doi.org/10.1103/physrevb.109.184302

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