Results 81 to 90 of about 7,012 (198)

A New Family of Buckled Rings on the Unit Sphere

Mathematics
Buckled rings, also known as pressurized elastic circles, can be described as critical points for a variational problem, namely the integral of a quadratic polynomial in the geodesic curvature of a curve. Thus, they are a generalization of elastic curves,
David A. Singer
doaj   +1 more source

Third Harmonic Generation in Transparent Longitudinal Epsilon‐Near‐Zero Multilayers

Nanophotonics, Volume 15, Issue 14, 27 July 2026.
Transparent longitudinal epsilon‐near‐zero stacks enable field‐enhanced nonlinear light generation while preserving high near‐infrared pump transmission. Broadband third‐harmonic generation is experimentally observed demonstrating that TLENZ architectures can mitigate pump‐loss limitations and offer a promising platform for transparent nonlinear ...
Wallace Jaffray, Sven Stengel, Domenico de Ceglia, Neset Akozbek, Filippo Capolino, Marcello Ferrera, Michael Scalora, Maria Antonietta Vincenti   +7 more
wiley   +1 more source

Direct Observations of Large‐Scale Wave Structure and Post‐Sunset Rise of the Ionosphere in the Generation of Equatorial Spread F

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Large‐scale wave structure (LSWS) and the post‐sunset rise (PSSR) are two key factors in the generation of equatorial spread F (ESF). In this study, we reported continuous and direct observations of LSWS and PSSR and their effects on seeding ESF by Sanya incoherent scatter radar (SYISR) and ionosonde in September–October 2024.
Qi Jiang, Jiuhou Lei, Xinan Yue, Fuqing Huang, Rong Xia, Tong Dang, Xiaoli Luan   +6 more
wiley   +1 more source

Non-topological solitons and quasi-solitons

Reports on Progress in Physics
Abstract Solitons in relativistic field theories are not necessarily topologically charged. In particular, non-topological solitons—known as Q-balls—arise naturally in nonlinear field theories endowed with attractive interactions and internal symmetries.
openaire   +3 more sources

Tomography of solitons

Journal of Optics B: Quantum and Semiclassical Optics, 2003
15 pages, 6 figures available at the web site http://people.na.infn.it/~fedele/tomosol-figs/tomosol-fig ...
S. De Nicola, FEDELE, RENATO, M. A. Man'ko, V. I. Man'ko   +3 more
openaire   +4 more sources

Generation of a Train of Ultrashort Pulses Near-Infrared Regime in a Tapered Photonic Crystal Fiber Using Raised-Cosine Pulses

IEEE Photonics Journal, 2012
We consider an optical pulse propagating in a tapered photonic crystal fiber (PCF) wherein dispersion as well as nonlinearity varies along the propagation direction.
Samuel Olupitan, K. Senthilnathan, P. Ramesh Babu, Sumeet S. Aphale, K. Nakkeeran   +4 more
doaj   +1 more source

The Short and Long Timescale Responses of the Inner Magnetospheric EMIC Waves to the Solar Wind Dynamic Pressure

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract The causal relationships between solar wind dynamic pressure and Electromagnetic Ion‐Cyclotron (EMIC) H+ ${\mathrm{H}}^{+}$, He+ ${\mathrm{H}\mathrm{e}}^{+}$, O+ ${\mathrm{O}}^{+}$ waves at L=3−6 $L=3-6$ are investigated with transfer entropy at short (<15 ${< } 15$ min) and long (>45 ${ >} 45$ min) timescales. The short timescale responses of
Simon Wing, Jay R. Johnson, Anthony Saikin, Alexander Y. Drozdov, Derek Feitosa   +4 more
wiley   +1 more source

Exceptional Light Propagation via Generalized Bulk‐Edge Correspondence

Nanophotonics, Volume 15, Issue 13, 13 July 2026.
We show that unlike in electronic systems, localized edge states in topological photonics are governed not only by nontrivial bulk topology, but also by polarization‐dependent light‐line confinement conditions inherent to Maxwell's equations. This fundamentally generalized bulk‐edge correspondence unlocks new regimes of tunable near‐cutoff localization
Heitor da Silva, Sergey K. Ivanov, Isaac Suárez, José R. Salgueiro, Albert Ferrando   +4 more
wiley   +1 more source

The nature of quantum parallel processing and its implications for coding in brain neural networks: a novel computational mechanism

Frontiers in Network Physiology
Conventionally it is assumed that the nerve impulse is an electrical process based upon the observation that electrical stimuli produce an action potential as defined by Hodgkin Huxley (1952) (HH).
Andrew S. Johnson, William Winlow
doaj   +1 more source

Knotted Solitons

, 2016
The dynamical model on 3+1 dimensional spacetime admitting soliton solutions is discussed. The proposal soliton is localized in the vicinity of a closed contour, which could be linked and/or knotted. The topological charge is Hopf invariant. Some applications in realistic physical systems are indicated.
openaire   +2 more sources