Arbitrary order exceptional point induced by photonic spin–orbit interaction in coupled resonators
Sign Up to like & getrecommendations! Published in 2019 at "Nature Communications"
DOI: 10.1038/s41467-019-08826-6
Abstract: Many novel properties of non-Hermitian systems are found at or near the exceptional points—branch points of complex energy surfaces at which eigenvalues and eigenvectors coalesce. In particular, higher-order exceptional points can result in optical structures… read more here.
Keywords: exceptional points; exceptional point; order exceptional; arbitrary order ... See more keywords
Prospects and fundamental limits in exceptional point-based sensing
Sign Up to like & getrecommendations! Published in 2020 at "Nature Communications"
DOI: 10.1038/s41467-020-16373-8
Abstract: Exotic degeneracies in open quantum systems, so-called exceptional points, show rich physics and promise new applications, such as sensors with greatly enhanced response. Recent research on laser gyroscopes has uncovered limits of such sensors due… read more here.
Keywords: prospects fundamental; exceptional point; fundamental limits; limits exceptional ... See more keywords
Quantum state tomography across the exceptional point in a single dissipative qubit
Sign Up to like & getrecommendations! Published in 2019 at "Nature Physics"
DOI: 10.1038/s41567-019-0652-z
Abstract: Open systems with gain and loss, described by non-trace-preserving, non-Hermitian Hamiltonians, have been a subject of intense research recently. The effect of exceptional-point degeneracies on the dynamics of classical systems has been observed through remarkable… read more here.
Keywords: point; exceptional point; state tomography; quantum state ... See more keywords
Bifurcation of avoided crossing at an exceptional point in the dispersion of sound and light in locally resonant media
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Applied Physics"
DOI: 10.1063/1.5012999
Abstract: The avoided crossing behavior in the interaction of propagating sound or light waves with resonant inclusions is analyzed using a simple model of an acoustic medium containing damped mass-spring oscillators, which is shown to be… read more here.
Keywords: avoided crossing; dispersion; exceptional point; bifurcation avoided ... See more keywords
No exceptional precision of exceptional-point sensors
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review A"
DOI: 10.1103/physreva.98.023805
Abstract: Recently, sensors with resonances at exceptional points (EPs) have been suggested to have a vastly improved sensitivity due to the extraordinary scaling of the complex frequency splitting of the n initially degenerate modes with the… read more here.
Keywords: perturbation; exceptional point; point sensors; precision exceptional ... See more keywords
Environmentally Induced Exceptional Points in Elastodynamics
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review Applied"
DOI: 10.1103/physrevapplied.13.014060
Abstract: We study the nature of an environment-induced exceptional point in a non-Hermitian pair of coupled mechanical oscillators. The mechanical oscillators are a pair of pillars carved out of a single isotropic elastodynamic medium made of… read more here.
Keywords: exceptional point; exceptional points; environmentally induced; points elastodynamics ... See more keywords
Hybrid exceptional point created from type-III Dirac point
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.101.045130
Abstract: Degeneracy points and exceptional points embedded in the energy band are distinct because of their topological features. We report a hybrid exceptional point formed through merging two ordinary exceptional points with opposite chiralities that were… read more here.
Keywords: created type; hybrid exceptional; exceptional point; exceptional points ... See more keywords
Higher-order exceptional point in a cavity magnonics system
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.99.054404
Abstract: We propose to realize the pseudo-Hermiticity in a cavity magnonics system consisting of the Kittel modes in two small yttrium-iron-garnet spheres coupled to a microwave cavity mode. The effective gain of the cavity can be… read more here.
Keywords: order exceptional; system; exceptional point; cavity ... See more keywords
Topological Waveguiding near an Exceptional Point: Defect-Immune, Slow-Light, and Loss-Immune Propagation.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.121.093901
Abstract: Electromagnetic waves propagating in conventional wave-guiding structures are reflected by discontinuities and decay in lossy regions. In this Letter, we drastically modify this typical guided-wave behavior by combining concepts from non-Hermitian physics and topological photonics.… read more here.
Keywords: propagation; point; exceptional point; near exceptional ... See more keywords
Harnessing Dynamical Encircling of an Exceptional Point in Anti-PT-Symmetric Integrated Photonic Systems.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.273601
Abstract: Dynamically encircling an exceptional point in a non-Hermitian system can lead to chiral behaviors, but this process is difficult for on-chip PT-symmetric devices which require accurate control of gain and loss rates. Here, we experimentally… read more here.
Keywords: anti symmetric; symmetric integrated; integrated photonic; exceptional point ... See more keywords
Subwavelength control of light transport at the exceptional point by non-Hermitian metagratings
Sign Up to like & getrecommendations! Published in 2023 at "Science Advances"
DOI: 10.1126/sciadv.adf3510
Abstract: The concept of non-Hermitian physics, originally developed in the context of quantum field theory, has been investigated on distinct photonic platforms and created a plethora of counterintuitive phenomena. Interfacing non-Hermitian photonics and nanoplasmonics, here, we… read more here.
Keywords: hermitian metagratings; photonics; non hermitian; exceptional point ... See more keywords