Controlling Exceptional Points with Light

Abstract

We propose and show that application of light leads to an intriguing platform for controlling exceptional points in non-Hermitian topological systems. We demonstrate our proposal using three different non-Hermitian systems -- nodal line semimetals, semi-Dirac semimetals and Dirac semimetals -- and show that using illumination with light one can engineer the positions and stability of exceptional points. We illustrate the topological properties of these models and map out their light-driven topological phase transitions.

13 pages, 11 figures

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Cited by in corpus (20)

• Non-Hermitian Topological Phases: Principles and Prospects
• Floquet engineering of point-gapped topological superconductors
• Non-Hermitian Floquet Topological Matter -- A Review
• Non-Hermitian higher-order topological superconductors in two-dimension: statics and dynamics
• Driving-induced multiple $\mathcal{P}\mathcal{T}$-symmetry breaking transitions and reentrant localization transitions in non-Hermitian Floquet quasicrystals
• Floquet engineering and simulating exceptional rings with a quantum spin system
• Generalized bulk-boundary correspondence in periodically driven non-Hermitian systems
• Non-Hermitian Weyl semimetal and its Floquet engineering
• Light-driven Lifshitz transitions in non-Hermitian multi-Weyl semimetals
• Non-Hermitian Skin Effect in Periodically-Driven Dissipative Ultracold Atoms
• Hexagonally warped exceptional physics in multi-Weyl semimetals
• Non-Hermiticity induced Exceptional Points and Skin Effect in the Dice-Haldane Model
• Entanglement phase transitions in non-Hermitian Floquet systems
• Floquet Exceptional Topological Insulator
• Floquet Engineering of Multifold Fermions
• Extended unitarity and absence of skin effect in periodically driven systems
• Tailoring higher-order van Hove singularities in non-Hermitian interface systems via Floquet engineering
• Breakdown of Non-Bloch Bulk-Boundary Correspondence and Emergent Topology in Floquet Non-Hermitian Systems
• $q$th-root non-Hermitian Floquet topological insulators
• Phase transition from Weyl to self-linked semimetal using bi-circular laser