6 papers
NHSE-Driven Coalescence of Topological Defect States in Non-Hermitian Systems
S. M. Rafi-Ul-Islam, Zhuo Bin Siu, Md. Saddam Hossain Razo +1
In this work, we describe a novel localization phenomena, the so-called topological defect accumulation, occurring in a non-Hermitian chain with an arbitrary number of defect sites…
Reconfigurable Defect States in Non-Hermitian Topolectrical Chains with Gain and Loss
S. M. Rafi-Ul-Islam, Zhuo Bin Siu, Md Saddam Hossain Razo +1
We investigate the interplay between the non-Hermitian skin effect (NHSE), parity-time (PT) symmetry, and topological defect states in a finite non-Hermitian Su-Schrieffer-Heeger (…
Anomalous Non-Hermitian Skin Effects in Coupled Hermitian Chains with Cross-Coupling
S M Rafi-Ul-Islam, Zhuo Bin Siu, Md. Saddam Hossain Razo +1
In this work, we demonstrate the presence of an anomalous non-Hermitian skin effects which decay from both ends of a system consisting of two coupled Hermitian chains induced by no…
Dynamic Manipulation of Non-Hermitian Skin Effect through Frequency in Topolectrical Circuits
S M Rafi-Ul-Islam, Zhuo Bin Siu, Md. Saddam Hossain Razo +1
One of the most fascinating phenomena in non-Hermitian systems is the extensive accumulation of the bulk eigenstates under open-boundary conditions which is known as the non-Hermit…
Exceptional Points and Braiding Topology in Non-Hermitian Systems with long-range coupling
S. M. Rafi-Ul-Islam, Zhuo Bin Siu, Md. Saddam Hossain Razo +1
We present a study of complex energy braiding in a 1D non-Hermitian system with th order long range asymmetrical coupling. Our work highlights the emergence of novel topological…
Saturation Dynamics in Non-Hermitian Topological Sensing Systems
S. M. Rafi-Ul-Islam, Zhuo Bin Siu, Md. Saddam Hossain Razo +1
A class of non-Hermitian topological sensors (NTOSs) was recently proposed in which the NTOS comprises a non-Hermitian Su-Schrieffer-Heeger chain with a measurant-dependent couplin…