Article
Materials Science, Multidisciplinary
Ting Hu, Qi Wei, Xing-Feng Zhu, Jie Yao, Da-Jian Wu
Summary: The proposed acoustic anti-parity-time (A-PT) symmetric structure demonstrates extraordinary scattering properties, achieving acoustic coherent perfect absorption and equivalent laser effects in the symmetric phase of the scattering matrix. This structure may facilitate further experimental realizations and offer an alternative approach to design acoustic functional devices.
Article
Mathematics, Applied
Yong Chen, Zhenya Yan, Boris A. Malomed
Summary: We studied a class of physically intriguing PT-symmetric generalized Scarf-II (GS-II) potentials that can support exact solitons in one- and multi-dimensional nonlinear Schrodinger equation. In the 1D and multi-D settings, we found that a properly adjusted localization parameter may support fully real energy spectra. Continuous families of fundamental and higher-order solitons were produced. While the fundamental states were stable, the higher-order ones were unstable. The stable solitons were capable of robust propagation and remained trapped in slowly moving potential wells, which offers possibilities for manipulating optical solitons. Adiabatic variation of potential parameters could transform solitons into stable forms.
PHYSICA D-NONLINEAR PHENOMENA
(2022)
Article
Physics, Multidisciplinary
Yu-Liang Fang, Jun-Long Zhao, Yu Zhang, Dong-Xu Chen, Qi-Cheng Wu, Yan-Hui Zhou, Chui-Ping Yang, Franco Nori
Summary: This study experimentally demonstrates single-qubit coherence flow in PT- and APT-symmetric systems using an optical setup. Different periodic oscillations of coherence are observed in the symmetry unbroken regime, with two complete coherence backflows in one period in the PT-symmetric system and one backflow in the APT-symmetric system. The phenomenon of stable value of coherence flow is observed in the symmetry broken regime, and most experimental data agree with theoretical results within one standard deviation, suggesting potential avenues for future research in the dynamics of coherence in PT- and APT-symmetric systems.
COMMUNICATIONS PHYSICS
(2021)
Article
Quantum Science & Technology
Federico Roccati, Salvatore Lorenzo, G. Massimo Palma, Gabriel T. Landi, Matteo Brunelli, Francesco Ciccarello
Summary: In a paradigmatic setup, researchers studied the dynamics of correlations to observe PT-symmetric physics, finding that quantum correlations exhibit different long-time behaviors in the PT-broken phase and at the exceptional points. At the exceptional point, classical correlations diverge while quantum correlations tend to zero.
QUANTUM SCIENCE AND TECHNOLOGY
(2021)
Article
Optics
Peng Guo, Vladimir Gasparian, Esther Jodar, Christopher Wisehart
Summary: In this study, we propose a generalized approach to tunneling time in parity and time (PT)-symmetric systems. The properties of tunneling time in PT-symmetric systems are examined using a simple contact interaction periodic finite-size diatomic PT-symmetric model. The physical interpretation of negative tunneling time in PT-symmetric systems and its relationship to spectral singularities are discussed.
Article
Physics, Multidisciplinary
Noah Flemens, Jeffrey Moses
Summary: Recent research has shown that under certain conditions, coherent couplings can allow non-Hermitian subsystems to control containing Hermitian systems. This finding suggests a new approach for engineering dynamics, which could be of significance for photonics and laser science.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Satoru Hayami, Megumi Yatsushiro, Hiroaki Kusunose
Summary: This article theoretically investigates the nonlinear spin Hall effect in PT-symmetric antiferromagnetic metals and elucidates its microscopic origin and conditions for enhancement through analyzing a microscopic model. A table with useful correspondences is also provided.
Article
Materials Science, Multidisciplinary
Jeng Yi Lee, Pai-Yen Chen
Summary: The study examines the optical forces on PT symmetric heterostructures under different conditions, utilizing a generalized parametric space to analyze the directionality and magnitudes of forces. It is found that the forces exhibit different effects depending on the relative phases and conditions, with null forces observed in specific regions.
Article
Optics
Mahmut Bagci
Summary: Partially parity-time-symmetric (pPT-symmetric) lattice solitons in quadratic nonlinear media are investigated, showing the possibility of stable evolution of solitons in this type of medium. The effects of varying lattice depth and quadratic nonlinearity strength on the model characteristics are examined comprehensively, and the stability of the solitons is tested using nonlinear evolution and linear stability spectra.
Article
Physics, Multidisciplinary
Da Ma, Arpit Arora, Giovanni Vignale, Justin C. W. Song
Summary: Berry curvature and skew scattering are important for the anomalous Hall effect in antiferromagnetic metals. In PT-symmetric antiferromagnetic metals, the Hall effects individually vanish. However, we reveal a new nonlinear Hall effect (ASN) that relies on both Berry curvature and skew scattering working together. This ASN produces helicity dependent photocurrents, which can be used to investigate the antiferromagnetic order in PT-symmetric metals.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Hao-Han Chen, Jie-Feng Xu, Xiang-Bo Yang, Zhan-Hong Lin
Summary: This paper designs a unique one-dimensional double anti-PT-symmetric ring optical waveguide network, studies its optical characteristics and identifies extremum mode points through a connection function, leading to extraordinary ultra-strong transmission and reflection, showing potential for applications in optical filters and amplifiers.
CHINESE JOURNAL OF PHYSICS
(2022)
Article
Mathematics, Applied
A. R. Thasneem, P. A. Subha
Summary: In this study, the stationary solutions of the coupled nonlinear Schrodinger equation with self-defocusing nonlinearity and super-Gaussian form of parity-time (PT) symmetric potential in an optical system are analyzed. The stationary eigenmodes of the ground and excited states and the influence of the gain/loss coefficient on the eigenvalue spectra are discussed. The threshold condition of the PT-symmetric phase transition of the high and low-frequency modes is studied, and the variation of the threshold values with the coupling constant and the effect of the nonlinearity on the eigenmodes are analyzed. The stability of the solution is verified using linear-stability analysis, and the power distribution of the fundamental solutions with the propagation in the PT and broken PT regimes in the two channels of the system is analyzed.
Article
Optics
Jin Yang, Shuaijie Yuan, Qianyang LI, Yu Chen, Xinxing Zhou
Summary: This study proposes a feasible way to amplify and control the photonic spin Hall effect (PSHE) in a wide range of incident angles by modulating the Fermi energy in a quasi-PT-symmetric structure embedded with monolayer graphene. The electrically tunable PSHE can be achieved for both horizontal and vertical polarizations near the quasi-exceptional points.
Article
Engineering, Mechanical
Cheng Zhao, Kai Zhang, Pengcheng Zhao, Zichen Deng
Summary: This study evaluates the wave propagation characteristics of nonlinear two-dimensional acoustic metamaterials using perturbation method and quantitative analysis. The results show that wave amplitude affects the dispersion relations and group velocity, and dual-wave vector phenomenon is observed.
NONLINEAR DYNAMICS
(2022)
Article
Chemistry, Multidisciplinary
Bong Joo Kang, David Rohrbach, Fabian D. J. Brunner, Salvatore Bagiante, Hans Sigg, Thomas Feurer
Summary: Researchers elucidate the details and timescales of mode switching in two-dimensional THz metamaterials consisting of metallic structures, and identify the dominant carrier generation mechanisms and dynamics.
Article
Materials Science, Multidisciplinary
O. V. Shramkova, N. Lazarides, G. P. Tsironis, A. V. Ustinov
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2017)
Article
Mathematics, Applied
J. Hizanidis, N. Lazarides, G. P. Tsironis
Review
Physics, Multidisciplinary
N. Lazarides, G. P. Tsironis
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2018)
Article
Mathematics, Applied
J. Hizanidis, N. Lazarides, G. P. Tsironis
Article
Mathematics, Interdisciplinary Applications
N. Lazarides, J. Hizanidis, G. P. Tsironis
CHAOS SOLITONS & FRACTALS
(2020)
Article
Mathematics, Applied
J. Shena, N. Lazarides, J. Hizanidis
Article
Mathematics, Interdisciplinary Applications
Zoran Ivic, Dalibor Cevizovic, Zeljko Przulj, N. Lazarides, G. P. Tsironis
Summary: By studying the propagation of a pulse in a dispersive medium, it is found that the ratio of the pulse frequency to the dipole resonant frequency plays a crucial role in controlling self-induced transparency, where the pulse can be fully absorbed and stopped by the medium. This dispersion-induced pulse stopping showcases the quantum nature of the medium and has potential applications in metamaterials.
CHAOS SOLITONS & FRACTALS
(2021)
Article
Mathematics, Applied
J. Shena, N. Lazarides, J. Hizanidis
Summary: The phenomena of intermittent and complete synchronization between two out of three identical, magnetically coupled Superconducting QUantum Interference Devices (SQUIDs) are investigated numerically. SQUIDs are highly nonlinear superconducting oscillators/devices that exhibit strong resonant and tunable response to applied magnetic field(s). In SQUID oligomers, the dynamic complexity increases considerably with the number of SQUIDs.
Article
Mathematics, Interdisciplinary Applications
N. Lazarides, Giorgos P. Veldes, Amaria Javed, Ioannis Kourakis
Summary: This study considers the interaction between two co-propagating electrostatic wavepackets characterized by arbitrary carrier wavenumber. A perturbation method is used to derive a pair of coupled nonlinear Schrodinger equations governing the dynamics of the wavepacket amplitudes. The study reveals the possibility of modulational instability in a wide range of values and shows that wave-wave coupling enhances the occurrence of instability.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Materials Science, Multidisciplinary
M. Pejic, Z. Przulj, D. Chevizovich, N. Lazarides, G. P. Tsironis, Z. Ivic
Summary: We study the quantum features of electromagnetic radiation in a one-dimensional superconducting quantum metamaterial and find the emergence of bound states of single-photon qubits. This discovery indicates the potential application of controlling photon transport in artificial media based on superconducting qubits.
Article
Physics, Fluids & Plasmas
Ethan Zack, Daimeng Zhang, Melissa Trepanier, Jingnan Cai, Tamin Tai, Nikos Lazarides, Johanne Hizanidis, Steven M. Anlage
Summary: The strong nonlinearity of a self-resonant radio-frequency superconducting-quantum-interference-device (SQUID) meta-atom is explored through intermodulation measurements. The dynamics of the device with zero and nonzero dc magnetic flux are studied, revealing different characteristics and predicting chaos in certain regimes. Understanding intermodulation in rf SQUID metamaterials is crucial for low-noise amplification of microwave signals and tunable filters.
Article
Materials Science, Multidisciplinary
N. Lazarides, G. P. Tsironis
Article
Mathematics, Interdisciplinary Applications
Johanne Hizanidis, Nikos Lazarides, Giorgos P. Tsironis
FRONTIERS IN APPLIED MATHEMATICS AND STATISTICS
(2019)
Article
Multidisciplinary Sciences
N. Lazarides, G. P. Tsironis
SCIENTIFIC REPORTS
(2019)
Article
Physics, Fluids & Plasmas
N. Lazarides, G. P. Tsironis