Virtual Parity-Time Symmetry

Abstract

Parity-time (PT) symmetry has been opening exciting opportunities in optics, yet the required careful balance of loss and gain has been hindering its practical implementations. Here, we propose a gain-free route to PT-symmetry based on non-monochromatic excitations that mimic loss and gain in passive systems. Based on the concept of virtual absorption, extended here to implement also virtual gain, we induce PT-symmetry and its landmark effects, such as broken phase transitions, anisotropic transmission resonances and laser-absorber pairs, in a fully passive, hence inherently stable, system. These results open a path to establish PT-symmetric phenomena in purely passive platforms.

arXiv comment18 pages, 4 figures, and the supplement is not included

References in corpus (18)

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• Coherently Enhanced Wireless Power Transfer

Cited by in corpus (23)

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• Non-Hermitian chiral phononics through optomechanically-induced squeezing
• Temporal Switching to Extend the Bandwidth of Thin Absorbers
• Beyond Bounds on Light Scattering with Complex Frequency Excitations
• Transmission zeros and ultrasensitive detection in complex systems
• Use of Transmission and Reflection Complex Time Delays to Reveal Scattering Matrix Poles and Zeros: Example of the Ring Graph
• Polaritonic Quantum Matter
• Gain-Loss Coupled Systems
• Higher-order Skin Effect through a Hermitian-non-Hermitian Correspondence and Its Observation in an Acoustic Kagome Lattice
• Theory of coherent active convolved illumination for superresolution enhancement
• Tunable virtual gain in resonantly absorbing media
• Lighting of a monochromatic scatterer with virtual gain
• Enhanced sensing of optomechanically induced nonlinearity by linewidth suppression and optical bistability in cavity-waveguide systems
• Coexistence of directed momentum current and ballistic energy diffusion in coupled non-Hermitian kicked rotors
• Takagi topological insulator with odd $\mathcal{P}\mathcal{T}$ pairs of corner states
• Virtual perfect absorption in resonant media and their PT-symmetric generalizations
• Non-Hermitian Floquet-Free Analytically Solvable Time Dependant Systems
• Experimental realization of the active convolved illumination imaging technique for enhanced signal-to-noise ratio
• Parity-Time Symmetry and Exceptional points: A Tutorial
• Takagi Topological Insulator on the Honeycomb Lattice
• Simple theoretical model for parity-time-symmetric metasurfaces
• Reflectionless Plasma Ignition via High-Power Virtual Perfect Absorption
• Non-linear and weak-coupling expansion in Quantum Field Theory