1. Necklace-State-Mediated Anomalous Enhancement of Transport in Anderson-Localized non-Hermitian Hybrid Systems
- Author
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Sushil Mujumdar, Sandip Mondal, and M. Balasubrahmaniyam
- Subjects
Physics ,Condensed matter physics ,Complex system ,General Physics and Astronomy ,Necklace ,Conductance ,Condensed Matter::Disordered Systems and Neural Networks ,01 natural sciences ,Hermitian matrix ,Hybrid system ,0103 physical sciences ,Quasiparticle ,010306 general physics ,Eigenvalues and eigenvectors ,Plasmon - Abstract
Non-Hermiticity is known to manifest interesting modifications in the transport properties of complex systems. We report an intriguing regime of transport of hybrid quasiparticles in a non-Hermitian setting. We calculate the probability of transport, quantified by the Thouless conductance, of hybrid plasmons under varying degrees of disorder. With increasing disorder, we initially observe an expected decrease in average transmission, followed by an anomalous rise at localizing disorder. The behavior originates from the confluence of hybridization and non-Hermiticity, in which the former realizes the aggregation of eigenvalues migrating under disorder, while the latter enables energy transfer between the eigenmodes. We find that the enhanced transmission is mediated by quasiparticle hopping over various Anderson-localized states within the so-formed necklace states. We note that, in this scenario, all configurations exhibit the formation of necklace states and enhanced transport, unlike the conventionally known behavior of necklace states which only occurs in rare configurations.
- Published
- 2020