Article
Optics
Guilhem Poy, Andrew J. Hess, Andrew J. Seracuse, Michael Paul, Slobodan Zumer, Ivan I. Smalyukh
Summary: Researchers demonstrate systems in which optical solitons coexist and interact with topological solitonic structures localized in the molecular alignment field of a soft birefringent medium. The findings could lead to solitonic tractor beams and new light-matter self-patterning phenomena.
Article
Physics, Multidisciplinary
Li-Cheng Wang, Yang Chen, Ming Gong, Feng Yu, Qi-Dai Chen, Zhen-Nan Tian, Xi-Feng Ren, Hong-Bo Sun
Summary: This study quantifies the edge states and localization lengths in topological phase transitions through measuring the survival probability. The experiment provides an alternative approach for characterizing topological phase transitions and extracting critical exponents.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
H. Merbouche, B. Divinskiy, K. O. Nikolaev, C. Kaspar, W. H. P. Pernice, D. Gouere, R. Lebrun, V Cros, J. Ben Youssef, P. Bortolotti, A. Anane, S. O. Demokritov, V. E. Demidov
Summary: This study demonstrates the complexity of nonlinear wave processes in microscopic magnetic structures and emphasizes the importance of understanding them for technical applications of spin waves in integrated devices.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Guo Liang, Fangjie Shu, Wenjing Cheng, Longbo Jiao
Summary: We investigated the evolutions of optical beams in an optical system composed of free spaces and nonlocal nonlinear media layers in a cascaded manner and discussed in details two kinds of evolution processes for Gaussian beams from an application point of view.
Article
Multidisciplinary Sciences
Wenkang Ye, Lingling Hu, Haifeng Ou, Tongxi Yu
Summary: We introduce a novel spring-linkage-based metamaterial that can convert compressive waves into pure tension and separate them from tension-compression mixed waves. The extraordinary functions of this material can be controlled by tuning a key switch cell, offering possibilities for more complex manipulation and utilization of mechanical signals.
Article
Materials Science, Multidisciplinary
Mikhail Cherkasskii, Michael Farle, Anna Semisalova
Summary: Inertia effects in magnetization dynamics lead to a different type of spin waves propagating at terahertz frequencies in ferromagnetic thin films, with slower velocities than conventional precession spin waves. These new nutation surface spin waves are also found to be backward spin waves. Additionally, inertia causes a decrease in the frequency of precession spin waves, depending on the magnetic properties and geometry of the film.
Article
Optics
Qin Wen, Wenwen Cui, Yong Geng, Heng Zhou, Kun Qiu
Summary: A novel method of precisely controlling the free spectral range (FSR) of silica micro-rod resonators is demonstrated using iterative laser annealing. This method allows for the generation of single dissipative Kerr soliton microcombs and precise tuning of soliton repetition frequencies. The demonstrated technique has potential applications in dual-comb spectroscopy and coherent optical communications.
CHINESE OPTICS LETTERS
(2021)
Article
Chemistry, Physical
Sangyeun Park, Joohyung Bang, Hongyun So
Summary: This paper presents a novel fabrication method for magnetically controllable micro-patterned wall arrays (MCMAs) for manipulating droplets. The MCMAs exhibit superhydrophobic properties without additional post-treatment and can be operated by analyzing the bending characteristics due to the magnetic force. The droplet transport pattern was verified under various conditions, and a high aspect ratio of MCMAs produced a continuous concave surface shape for stable droplet transport.
SURFACES AND INTERFACES
(2023)
Review
Mathematics, Applied
Gabriel D. Chaves-O'Flynn, D. L. Stein
Summary: In this paper, the authors review the challenges associated with thermal activation in nanoscopic magnetic systems and discuss transitions between different magnetic structures. The findings have important implications for understanding the behavior of thermal activation in nanoscale magnetic systems.
PHYSICA D-NONLINEAR PHENOMENA
(2023)
Article
Optics
Jinzhong Zhu, Yue Mu, Guoxiang Huang
Summary: We propose a scheme to achieve simultaneous quantum squeezing of light polarizations and atomic spins via a perturbed double electromagnetically induced transparency (DEIT) in a cold four-level atomic ensemble. By deriving quantum nonlinear Schrodinger equations, we develop a theory of vector optical soliton (VOS) which exhibits ultraslow propagation velocity and extremely low generation power. We demonstrate that the perturbed DEIT leads to large polarization squeezing of the probe pulse and significant squeezing of atomic spins simultaneously. This work provides insights into the unique property of the quantum interface between light and atomic ensembles and has potential applications in quantum information and precision measurement.
Article
Optics
Aleksandr Ramaniuk, Marek Trippenbach, Pawel S. Jung, Demetrios N. Christodoulides, Wieslaw Krolikowski, Gaetano Assanto
Summary: This study investigates scalar and vector multi-hump spatial solitons excited in a nonlocal medium by competing Kerr-like nonlinear responses. Two-color vector supermode solitons are easier to control but exhibit an intriguing form of spontaneous symmetry breaking during propagation.
Article
Multidisciplinary Sciences
Pawel S. Jung, Georgios G. Pyrialakos, Fan O. Wu, Midya Parto, Mercedeh Khajavikhan, Wieslaw Krolikowski, Demetrios N. Christodoulides
Summary: The nonlinear evolution dynamics in topological photonic lattices is systematically investigated within the framework of optical thermodynamics. This approach allows for the precise prediction of topological currents even under the extreme complexity introduced by nonlinearity.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Ryotatsu Yanagimoto, Edwin Ng, Logan G. Wright, Tatsuhiro Onodera, Hideo Mabuchi
Summary: The study utilizes matrix product state representation to efficiently simulate ultrashort pulses in nonlinear nanophotonic waveguides, enabling research on nonlinear behaviors. Analyzing the quantum states of solitons and multions reveals their entanglement structure and non-classical characteristics.
Article
Astronomy & Astrophysics
Hong-Yi Zhang, Mudit Jain, Mustafa A. Amin
Summary: This paper demonstrates the existence of vector oscillons in the low-energy effective theory of an interacting massive vector field. Two types of vector oscillons are provided, with vanishing orbital angular momentum and approximately spherically symmetric energy density.
Article
Optics
L. A. Rodriguez-Morales, I Armas-Rivera, M. Duran-Sanchez, E. Silvestre, M. Andres, B. Ibarra-Escamilla
Summary: The study investigated the polarization dynamics in a free birefringence mode-locked fiber laser through numerical and experimental methods, revealing changes in ellipticity due to nonlinear birefringence in a 20-m long bi-twisted fiber. The inclusion of bi-twisted fiber allowed for independent investigation of nonlinear effects and linear effects.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Physics, Applied
H. T. Nembach, R. D. McMichael, M. L. Schneider, J. M. Shaw, T. J. Silva
Summary: The study of spin wave spectra in nanomagnets is crucial for the development and optimization of magnetic devices and sensors. However, challenges remain in accurately determining materials parameters based on analysis and modeling of these spectra.
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Mingyu Hu, Ezio Iacocca, Mark A. Hoefer
Summary: In this study, the unsteady nonlinear magnetization dynamics in an easy-plane ferromagnetic channel under spin injection are investigated. The dynamics, driven by spin injection, a perpendicular applied magnetic field, the exchange interaction, and local demagnetizing fields, exhibit well-defined profiles such as rarefaction waves, dispersive shock waves, and solitons. The interaction between the spin injection strength and the applied magnetic field determines the realization of these coherent structures. The findings may contribute to the understanding of long-distance spin transport experiments.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Physics, Applied
Grant A. Riley, Justin M. Shaw, Thomas J. Silva, Hans T. Nembach
Summary: The accurate measurement of exchange interaction in ferromagnetic ultra thin films is challenging. Various methods have been used, but consensus has not been reached. This study presents a method using Brillouin light scattering to measure spin wave dispersion and determine exchange, saturation magnetization, and magnetic thickness simultaneously.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Hans T. Nembach, Emilie Jue, Kay Poetzger, Juergen Fassbender, Thomas J. Silva, Justin M. Shaw
Summary: The impact of He+ irradiation on the Dzyaloshinskii-Moriya interaction (DMI) in Ta/Co20Fe60B20/Pt/MgO samples was studied. It was found that irradiation with 40 keV He+ ions increased the DMI by approximately 20% for fluences up to 2 x 10(16) ions/cm(2), but decreased for higher fluence values. In contrast, the interfacial anisotropy showed a different fluence dependence. Monte-Carlo simulations revealed that ion irradiation increased disorder at the Ta and Pt interfaces, leading to an increase in the total number of triplets for the three-site exchange mechanism and consequently an increase in the DMI.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
Samuel J. Ryskamp, Mark A. Hoefer, Gino Biondini
Summary: In this study, resonant Y-shaped soliton solutions to the KPII equation are modeled as shock solutions, demonstrating a reduction to a one-dimensional system in the zero dispersion limit. The results have practical applications in analytically describing the dynamics of the Mach reflection problem, showing excellent agreement with direct numerical simulations.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Medicine, General & Internal
Christian Philip Stickels, Ramesh Nadarajah, Chris P. Gale, Houyuan Jiang, Kieran J. Sharkey, Ben Gibbison, Nick Holliman, Sara Lombardo, Lars Schewe, Matteo Sommacal, Louise Sun, Jonathan Weir-McCall, Katherine Cheema, James H. F. Rudd, Mamas Mamas, Feryal Erhun
Summary: This study aims to estimate the impact of different treatment strategies on the waiting list duration and mortality rate in the National Health Service in England. The results suggest that returning to pre-COVID-19 capacity is not feasible for clearing the backlog. Converting cases and increasing treatment capacity can help reduce waiting time, but deaths may still occur during the waiting period. Therefore, a change in the treatment strategy is needed to reduce the backlog and waiting list deaths.
Article
Physics, Multidisciplinary
Asela Abeya, Gino Biondini, Mark A. Hoefer
Summary: The Whitham modulation equations for the defocusing nonlinear Schrödinger (NLS) equation are derived using a two-phase ansatz and period-averaging the conservation laws. The resulting equations preserve the symmetries of the NLS equation and can be easily generalized from two to three spatial dimensions. The transformation to Riemann-type variables, harmonic and soliton limits, and reduction to the radial NLS equation are discussed. The extension to higher spatial dimensions is briefly outlined. The obtained NLS-Whitham equations can be applied in studying large amplitude wavetrains in nonlinear photonics and matter waves.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Physics, Multidisciplinary
Mark A. Hoefer, Ana Mucalica, Dmitry E. Pelinovsky
Summary: By using the Darboux transformation for the Korteweg-de Vries equation, exact solutions describing the interaction of a solitary wave and a traveling cnoidal wave are constructed and analyzed. These wave patterns, referred to as breathers due to their unsteady, wavepacket-like character, include both bright and dark breather solutions. The nonlinear dispersion relations show that the bright (dark) breathers propagate faster (slower) than the background cnoidal wave. Two-soliton solutions are obtained when the cnoidal wave degenerates, and in the small amplitude regime, dark breathers can be accurately approximated by dark soliton solutions of the nonlinear Schrodinger equation. These findings provide valuable insights into recent experiments on soliton-dispersive shock wave interactions and soliton gases.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Review
Mathematics, Applied
Mark J. J. Ablowitz, Justin T. T. Cole, Gennady A. A. El, Mark A. A. Hoefer, Xu-Dan Luo
Summary: The evolution of solitons interacting with rarefaction waves and dispersive shock waves is studied using three different analytical approaches. The results show that these approaches are consistent, agree with numerical simulations, and accurately describe various aspects of solitary wave-mean field interaction.
STUDIES IN APPLIED MATHEMATICS
(2023)
Article
Mathematics, Applied
Marzia Romano, Sara Lombardo, Matteo Sommacal
Summary: The three wave resonant interaction model (3WRI) is a non-dispersive system used in many fields and possesses integrability. This paper conducts linear stability analysis of the 3WRI system, providing a topological classification of the stability spectra. It is found that the stability spectra of the 3WRI system exhibit new topological components different from those observed in the system of two coupled nonlinear Schrodinger equations. Speculation is made that the linear instability of baseband-type can be a necessary condition for the onset of rogue wave types in the 3WRI system.
ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK
(2023)
Article
Physics, Applied
M. Hu, M. A. Hoefer, M. J. Donahue
Summary: This study investigates spatially uniform static phases that can be achieved in an antiferromagnet at 0K by varying the external magnetic field along the anisotropy axis. The macrospin model is used to analyze the energy contributions from the external field, effective anisotropy, and spatially homogeneous antiferromagnetic exchange. The critical energy configurations are fully cataloged and stable states are identified using local energy concavity. Phase diagrams for energetic stability and phase transitions are provided based on the strength of the applied field and the ratio between anisotropy and antiferromagnetic exchange. Two nonstandard critical energy states are identified as energy saddle points and function as energy barriers between multiple stable states. The results determine thermal switching rates and suggest interesting antiferromagnetic textures and solitons.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Samuel J. Ryskamp, Mark A. Hoefer
Summary: This paper presents an efficient and accurate computational technique for directly calculating the dispersion of magnetoelastic waves in layered media. The linearized Navier and Landau-Lifshitz equations form a quadratic eigenvalue problem, which determines the wave-number-frequency dispersion branches and their mode profiles. The spectral collocation method is used to discretize the eigenvalue problem and obtain complete dispersion maps for single and double-layer magnetic systems. The numerical results provide insights into energy propagation and exchange between elastic and magnetic waves. The methods and findings contribute to the modeling and understanding of magnetic devices in spintronics innovation.
Article
Materials Science, Multidisciplinary
Dmitriy Zusin, Ezio Iacocca, Loic Le Guyader, Alexander H. Reid, William F. Schlotter, Tian-Min Liu, Daniel J. Higley, Giacomo Coslovich, Scott F. Wandel, Phoebe M. Tengdin, Sheena K. K. Patel, Anatoly Shabalin, Nelson Hua, Stjepan B. Hrkac, Hans T. Nembach, Justin M. Shaw, Sergio A. Montoya, Adam Blonsky, Christian Gentry, Mark A. Hoefer, Margaret M. Murnane, Henry C. Kapteyn, Eric E. Fullerton, Oleg Shpyrko, Hermann A. Durr, T. J. Silva
Summary: In this study, the laser-induced dynamics of labyrinth domain networks in ferromagnetic CoFe/Ni multilayers were investigated using ultrafast x-ray diffraction. It was observed that the amplitudes of the magnetic diffraction rings decreased to different degrees within a short period of time and the rings also broadened and contracted radially. By analyzing the diffraction rings using Fourier analysis, the broadening of the domain walls was quantitatively determined. These findings provide important evidence for understanding the dynamics of labyrinth domain structures under far-from-equilibrium conditions.
Article
Physics, Fluids & Plasmas
Marcos Caso-Huerta, Antonio Degasperis, Priscila Leal da Silva, Sara Lombardo, Matteo Sommacal
Summary: This article examines models describing long wave-short wave resonant interactions, including the YON model. The YON model combines the interaction terms of two long wave-short wave, integrable models, and contains arbitrary coupling constants. The article also constructs wave solutions and computes expressions for conservation laws.
Article
Materials Science, Multidisciplinary
Mingyu Hu, Ezio Iacocca, Mark A. Hoefer
Summary: This study investigates the unsteady, nonlinear magnetization dynamics induced by spin injection in an easy-plane ferromagnetic channel subject to an external magnetic field. The findings reveal a rich variety of nonlinear wave phenomena, such as oscillatory spin shocks and solitons, resulting from variable spin injection and the external field. The study also identifies new features, including composite wave complexes and distinct edge behaviors under supersonic conditions. These results have important physical implications for the generation of high frequency spin waves and the formation of stable solitons.