Drag-induced skin effect in a Bose-Fermi mixture

Abstract:The non-Hermitian skin effect (NHSE) represents one of the most distinctive phenomena in non-Hermitian physics. Here, we uncover a new drag-induced NHSE mechanism in interacting Bose--Fermi mixtures where only bosons and not fermions experience asymmetric hoppings. %While bosons exhibit intrinsic skin localization due to asymmetric hopping, fermions remain Hermitian in isolation and do not independently support NHSE. We show that strong Bose--Fermi interactions enable fermions to inherit boundary accumulation through correlated bound states. %In the few-body regime, The interplay of interactions, quantum statistics, and non-Hermitian dynamics gives rise to an interaction-induced blockade mechanism, leading to highly asymmetric fermionic transport. We demonstrate that the drag-induced NHSE is dynamically stable and propose a feasible realization in ultracold Bose--Fermi mixtures with Floquet-engineered asymmetric tunneling. Our results establish a general interaction-mediated mechanism for emergent non-Hermitian localization in hybrid quantum matter.

Quantum Gases (cond-mat.quant-gas); Quantum Physics (quant-ph)

arXiv:2606.03403 [cond-mat.quant-gas]

(or arXiv:2606.03403v1 [cond-mat.quant-gas] for this version)

https://doi.org/10.48550/arXiv.2606.03403 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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