4.6 Article

Wave-packet dynamics in a non-Hermitian exciton-polariton system

Related references

Note: Only part of the references are listed.
Article Nanoscience & Nanotechnology

From the Topological Spin-Hall Effect to the Non-Hermitian Skin Effect in an Elliptical Micropillar Chain

Subhaskar Mandal et al.

Summary: This study proposes a system based on exciton-polariton elliptical micropillars that exhibits both the topological spin-Hall effect and the non-Hermitian skin effect, which have implications for polariton transport and the formation of multiply charged vortices.

ACS PHOTONICS (2022)

Article Multidisciplinary Sciences

Annihilation of exceptional points from different Dirac valleys in a 2D photonic system

M. Krol et al.

Summary: The authors experimentally demonstrate the annihilation of exceptional points (EPs) from different Dirac points (valleys) by increasing non-Hermiticity in a liquid crystal microcavity platform. The platform utilizes voltage-controlled birefringence and TE-TM photonic spin-orbit-coupling, with non-Hermiticity provided by polarization-dependent losses. This study has significant implications for the field of non-Hermitian valley-physics.

NATURE COMMUNICATIONS (2022)

Article Materials Science, Multidisciplinary

Non-Hermitian skin effect and self-acceleration

Stefano Longhi

Summary: This paper investigates the dynamical characteristics of non-Hermitian systems in real space and uncovers a new feature of the non-Hermitian skin effect, namely the self-acceleration of the wave function. The observation of wave packet self-acceleration at early times serves as a clear signature of the non-Hermitian skin effect.

PHYSICAL REVIEW B (2022)

Article Multidisciplinary Sciences

Universal non-Hermitian skin effect in two and higher dimensions

Kai Zhang et al.

Summary: The authors introduce the skin effect discovered in a one-dimensional experiment and establish its universality in two and higher dimensional non-Hermitian systems. They also propose two new types of skin effect and show that systems with exceptional points exhibit the skin effect.

NATURE COMMUNICATIONS (2022)

Review Physics, Multidisciplinary

Beyond skyrmions: Review and perspectives of alternative magnetic quasiparticles

Boerge Goebel et al.

Summary: Magnetic skyrmions have attracted significant research interest since their discovery a decade ago, due to their non-trivial real-space topology and potential technological applications. However, the utilization of skyrmions in spintronic devices has not been achieved yet, mainly because of shortcomings in their current-driven motion. Additionally, beyond skyrmions, there are emerging trends in the field of topological spin textures.

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS (2021)

Article Optics

Observation of second-order meron polarization textures in optical microcavities

Mateusz Krol et al.

Summary: This study reports the experimental observation of stable individual second-order meron and antimeron in an electromagnetic field, formed by confining light into a liquid-crystal-filled cavity. These observations could potentially introduce topologically robust room-temperature optical vector textures into the field of photonic information processing and storage.

OPTICA (2021)

Article Physics, Multidisciplinary

Low-Energy Collective Oscillations and Bogoliubov Sound in an Exciton-Polariton Condensate

E. Estrecho et al.

Summary: In this study, low-energy, low-momentum collective oscillations of an exciton-polariton condensate in a round box trap were observed, with the frequencies of dipole and breathing modes consistent with a weakly interacting two-dimensional trapped Bose gas. The extracted speed of sound from the dipole oscillation frequency was found to be smaller than the Bogoliubov sound, partially due to the influence of the incoherent reservoir. These findings provide insights into the effects of reservoir, dissipation, energy relaxation, and finite temperature on the superfluid properties of exciton-polariton condensates and other two-dimensional open-dissipative quantum fluids.

PHYSICAL REVIEW LETTERS (2021)

Review Physics, Multidisciplinary

Exceptional topology of non-Hermitian systems

Emil J. Bergholtz et al.

Summary: This review discusses the current understanding of the role of topology in non-Hermitian systems and its physical consequences in dissipative settings, focusing on the concept of exceptional degeneracies and its distinct phenomena, as well as the new notions of gapped phases in single-band systems. The unique sensitivity of non-Hermitian matrices to boundary conditions is highlighted, leading to anomalous relationships between bulk and boundary physics. Additionally, applications of non-Hermitian topology in classical and quantum systems are reviewed, showing its relevance beyond the field of topological phases.

REVIEWS OF MODERN PHYSICS (2021)

Article Multidisciplinary Sciences

Spin-orbit-coupled exciton-polariton condensates in lead halide perovskites

Michael S. Spencer et al.

Summary: This study demonstrates photonic analogs of SOC in exciton-polaritons and their condensates in birefringent lead halide perovskite single crystal microcavities. Anisotropy in the crystal coupled with mode splitting in the optical cavity leads to a non-Abelian gauge field, allowing exciton-polaritons to undergo phase transitions to competing condensates with orthogonal polarizations near degenerate points. These exciton-polaritons and condensates, unlike their pure photonic counterparts, inherit nonlinearity from their excitonic components, serving as potential quantum simulators for many-body SOC processes.

SCIENCE ADVANCES (2021)

Article Multidisciplinary Sciences

Direct measurement of a non-Hermitian topological invariant in a hybrid light-matter system

Rui Su et al.

Summary: The text discusses the importance of topology in understanding and designing robust materials, as well as measuring the topological invariants in both Hermitian and non-Hermitian systems. It presents the measurement of a non-Hermitian topological invariant in the momentum-resolved spectrum of exciton polaritons, highlighting the potential for realizing non-Hermitian topological phases in condensed matter systems.

SCIENCE ADVANCES (2021)

Article Physics, Multidisciplinary

Experimental Measurement of the Divergent Quantum Metric of an Exceptional Point

Qing Liao et al.

Summary: This study reports the first experimental measurement of the quantum metric in a non-Hermitian system. The platform under study is an organic microcavity with exciton-polariton eigenstates, demonstrating exceptional points. The measurement shows the divergence of the quantum metric and determines the scaling exponent to be n = -1.01 +/- 0.08, consistent with the theoretical description of second-order exceptional points.

PHYSICAL REVIEW LETTERS (2021)

Article Physics, Multidisciplinary

Topological Field Theory of Non-Hermitian Systems

Kohei Kawabata et al.

Summary: This paper develops a field-theoretical description of intrinsic non-Hermitian topological phases, formulated solely in terms of spatial degrees of freedom. The theory provides a universal understanding of non-Hermitian topological phenomena and systematically predicts new physics like transport phenomena and skin effects induced by a perpendicular spatial texture in two dimensions. The non-Hermitian skin effect is shown to be a signature of an anomaly from the field-theoretical perspective.

PHYSICAL REVIEW LETTERS (2021)

Article Physics, Multidisciplinary

Bloch-type photonic skyrmions in optical chiral multilayers

Qiang Zhang et al.

Summary: The study predicts the existence of photonic twisted-Neel- and Bloch-type skyrmions in chiral materials, with chirality-dependent features that can be used for future chiral sensing, information processing, and storage technologies. The findings enrich the formations of photonic skyrmions and reveal a remarkable resemblance of the feature of chiral materials in two seemingly distant fields: photonic skyrmions and magnetic skyrmions.

PHYSICAL REVIEW RESEARCH (2021)

Article Materials Science, Multidisciplinary

Quantum metric and wave packets at exceptional points in non-Hermitian systems

D. D. Solnyshkov et al.

Summary: In non-Hermitian systems, the quantum metric plays a crucial role near exceptional points, controlling wave-packet trajectories with constant acceleration and velocity.

PHYSICAL REVIEW B (2021)

Article Multidisciplinary Sciences

Measurement of the quantum geometric tensor and of the anomalous Hall drift

A. Gianfrate et al.

NATURE (2020)

Article Multidisciplinary Sciences

Topological funneling of light

Sebastian Weidemann et al.

SCIENCE (2020)

Article Physics, Multidisciplinary

Meron Spin Textures in Momentum Space

Cheng Guo et al.

PHYSICAL REVIEW LETTERS (2020)

Article Physics, Multidisciplinary

Correspondence between Winding Numbers and Skin Modes in Non-Hermitian Systems

Kai Zhang et al.

PHYSICAL REVIEW LETTERS (2020)

Article Multidisciplinary Sciences

Synthetic band-structure engineering in polariton crystals with non-Hermitian topological phases

L. Pickup et al.

NATURE COMMUNICATIONS (2020)

Article Physics, Multidisciplinary

Reciprocal skin effect and its realization in a topolectrical circuit

Tobias Hofmann et al.

PHYSICAL REVIEW RESEARCH (2020)

Article Physics, Multidisciplinary

Non-Hermitian topological end-mode lasing in polariton systems

P. Comaron et al.

PHYSICAL REVIEW RESEARCH (2020)

Review Physics, Condensed Matter

New topological invariants in non-Hermitian systems

Ananya Ghatak et al.

JOURNAL OF PHYSICS-CONDENSED MATTER (2019)

Review Chemistry, Physical

Parity-time symmetry and exceptional points in photonics

S. K. Ozdemir et al.

NATURE MATERIALS (2019)

Review Physics, Multidisciplinary

Non-Hermitian physics and PT symmetry

Ramy El-Ganainy et al.

NATURE PHYSICS (2018)

Article Physics, Multidisciplinary

Biorthogonal Bulk-Boundary Correspondence in Non-Hermitian Systems

Flore K. Kunst et al.

PHYSICAL REVIEW LETTERS (2018)

Article Physics, Multidisciplinary

Weyl and Dirac semimetals in three-dimensional solids

N. P. Armitage et al.

REVIEWS OF MODERN PHYSICS (2018)

Article Physics, Multidisciplinary

Incident Direction Independent Wave Propagation and Unidirectional Lasing

L. Jin et al.

PHYSICAL REVIEW LETTERS (2018)

Article Physics, Applied

Perspective: Magnetic skyrmions-Overview of recent progress in an active research field

K. Everschor-Sitte et al.

JOURNAL OF APPLIED PHYSICS (2018)

Article Multidisciplinary Sciences

Exciton-polariton topological insulator

S. Klembt et al.

NATURE (2018)

Article Materials Science, Multidisciplinary

Anomalous helical edge states in a non-Hermitian Chern insulator

Kohei Kawabata et al.

PHYSICAL REVIEW B (2018)

Article Materials Science, Multidisciplinary

Measuring the quantum geometric tensor in two-dimensional photonic and exciton-polariton systems

O. Bleu et al.

PHYSICAL REVIEW B (2018)

Review Physics, Multidisciplinary

Skyrmions and Antiskyrmions in Quasi-Two-Dimensional Magnets

Alexey A. Kovalev et al.

FRONTIERS IN PHYSICS (2018)

Article Physics, Multidisciplinary

Edge Modes, Degeneracies, and Topological Numbers in Non-Hermitian Systems

Daniel Leykam et al.

PHYSICAL REVIEW LETTERS (2017)

Article Multidisciplinary Sciences

Emergent Momentum-Space Skyrmion Texture on the Surface of Topological Insulators

Narayan Mohanta et al.

SCIENTIFIC REPORTS (2017)

Article Multidisciplinary Sciences

Twist of generalized skyrmions and spin vortices in a polariton superfluid

Stefano Donati et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2016)

Article Materials Science, Multidisciplinary

Half-skyrmion spin textures in polariton microcavities

P. Cilibrizzi et al.

PHYSICAL REVIEW B (2016)

Article Multidisciplinary Sciences

Robust light transport in non-Hermitian photonic lattices

Stefano Longhi et al.

SCIENTIFIC REPORTS (2015)

Article Physics, Multidisciplinary

Non-Abelian Gauge Fields in Photonic Cavities and Photonic Superfluids

H. Tercas et al.

PHYSICAL REVIEW LETTERS (2014)

Article Multidisciplinary Sciences

Loss-induced suppression and revival of lasing

B. Peng et al.

SCIENCE (2014)

Review Nanoscience & Nanotechnology

Topological properties and dynamics of magnetic skyrmions

Naoto Nagaosa et al.

NATURE NANOTECHNOLOGY (2013)

Article Physics, Multidisciplinary

Skyrmion Formation and Optical Spin-Hall Effect in an Expanding Coherent Cloud of Indirect Excitons

D. V. Vishnevsky et al.

PHYSICAL REVIEW LETTERS (2013)

Article Physics, Multidisciplinary

Transmutation of Skyrmions to Half-Solitons Driven by the Nonlinear Optical Spin Hall Effect

H. Flayac et al.

PHYSICAL REVIEW LETTERS (2013)

Article Physics, Multidisciplinary

Quantum fluids of light

Iacopo Carusotto et al.

REVIEWS OF MODERN PHYSICS (2013)

Article Physics, Multidisciplinary

Exciton-polariton Bose-Einstein condensation

Hui Deng et al.

REVIEWS OF MODERN PHYSICS (2010)

Review Physics, Multidisciplinary

The electronic properties of graphene

A. H. Castro Neto et al.

REVIEWS OF MODERN PHYSICS (2009)

Article Physics, Multidisciplinary

Mean-Field Dynamics of a Non-Hermitian Bose-Hubbard Dimer

E. M. Graefe et al.

PHYSICAL REVIEW LETTERS (2008)

Article Materials Science, Multidisciplinary

Vortices in thin ferromagnetic films and the skyrmion number

O. A. Tretiakov et al.

PHYSICAL REVIEW B (2007)

Article Physics, Multidisciplinary

Exchange explosions: Magnetization dynamics during vortex-antivortex annihilation

Riccardo Hertel et al.

PHYSICAL REVIEW LETTERS (2006)

Article Multidisciplinary Sciences

Bose-Einstein condensation of exciton polaritons

J. Kasprzak et al.

NATURE (2006)

Article Multidisciplinary Sciences

Two-dimensional gas of massless Dirac fermions in graphene

KS Novoselov et al.

NATURE (2005)

Article Multidisciplinary Sciences

Electric field effect in atomically thin carbon films

KS Novoselov et al.

SCIENCE (2004)