Reciprocal Reservoir Induced Non-Hermitian Skin Effect
- URL: http://arxiv.org/abs/2307.15792v1
- Date: Fri, 28 Jul 2023 20:19:42 GMT
- Title: Reciprocal Reservoir Induced Non-Hermitian Skin Effect
- Authors: Xin Li, Mohamed Al Begaowe, Shu Zhang and Benedetta Flebus
- Abstract summary: The non-Hermitian skin effect (NHSE) describes the localization of macroscopic fraction of eigenstates at a specific boundary.
We show that the NHSE can be engineered in an open magnetic system interacting with a reciprocal reservoir.
Our work suggests the generality of nonreciprocal dynamics in magnetic systems and may inspire new schemes for engineering nonreciprocity in other quantum platforms.
- Score: 6.808148216858774
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The non-Hermitian skin effect (NHSE), which describes the localization of
macroscopic fraction of eigenstates at a specific boundary, is inherently tied
to nonreciprocity. Here, we show that the NHSE can be engineered in an open
magnetic system interacting with a reciprocal reservoir, through the interplay
between the reservoir-induced coherent and dissipative couplings. Based on a
Lindbladian time evolution, we investigate the transient nonreciprocal dynamics
along a spin chain and its unidirectional limit, which allow us to reveal both
consistency with and limitation of the non-Hermitian Hamiltonian approach. We
comment on the connection to the semiclassical dissipative magnetization
dynamics, and identify the key ingredients underlying the NHSE in magnetic
systems as Dzyaloshinskii-Moriya interaction (DMI) and dissipative coupling,
analogous to those in multi-layered magnet-metal heterostructures. Our work
suggests the generality of nonreciprocal dynamics in magnetic systems and may
inspire new schemes for engineering nonreciprocity in other quantum platforms.
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