Results 41 to 50 of about 58,163 (177)

Dynamical laws of superenergy in General Relativity

, 2007
The Bel and Bel-Robinson tensors were introduced nearly fifty years ago in an attempt to generalize to gravitation the energy-momentum tensor of electromagnetism.
Alfonso García-Parrado Gómez-Lobo, Anderson A, Bel L, Bel L, Bel L, Bel L, Bergqvist G, Bergqvist G, Bergqvist G, Chevreton M, Ellis G F R, Eriksson I, Eriksson I, Hawking S W, Herrera L, Herrera L, Jackson D, Klainerman S, Lazkoz R, Maartens R, Martín-García J M, Mashoon B, Naber G L, Penrose R, Penrose R Rindler W, Senovilla J M M, Senovilla J M M, Stephani H, Szabados L, Thorne K S   +29 more
core   +1 more source

Machine learning unveils surface refractive index dynamics in comb-like plasmonic optical fiber biosensors

Communications Engineering
The precise measurement of surface refractive index changes is crucial in biosensing, providing insights into bioreceptors–analytes interactions.
Hadrien Fasseaux, Médéric Loyez, Christophe Caucheteur   +2 more
doaj   +1 more source

Quaternion Gravi-Electromagnetism

, 2011
Defining the generalized charge, potential, current and generalized fields as complex quantities where real and imaginary parts represent gravitation and electromagnetism respectively, corresponding field equation, equation of motion and other quantum ...
A. S. Rawat, A.M. Polyakov, B. Julia, B.S. Rajput, B.S. Rajput, B.S. Rajput, B.S. Rajput, B.S. Rajput, C. Massa, D. Zwanzinger, D. Zwanzinger, D.D. Cattani, G. ’t Hooft, Gaurav Karnatak, J. Schwinger, J. Schwinger, J. Schwinger, J. Schwinger, J. Schwinger, J.S. Dowker, N. Craigie, N. Li, O. P. S. Negi, P.A.M. Dirac, P.S. Bisht, P.S. Bisht, P.S. Bisht, P.S. Bisht, Shalini Dangwal, W. Cates   +29 more
core   +1 more source

Entanglement detection with classical deep neural networks

Scientific Reports
In this study, we introduce an autonomous method for addressing the detection and classification of quantum entanglement, a core element of quantum mechanics that has yet to be fully understood.
Julio Ureña, Antonio Sojo, Juani Bermejo-Vega, Daniel Manzano   +3 more
doaj   +1 more source

Constitutive relations, off shell duality rotations and the hypergeometric form of Born-Infeld theory

, 2013
We review equivalent formulations of nonlinear and higher derivatives theories of electromagnetism exhibiting electric-magnetic duality rotations symmetry.
E Cremmer, E Cremmer, E Cremmer, MK Gaillard, S Cecotti, S Deser, S Ferrara, SM Kuzenko, SV Ketov   +8 more
core   +1 more source

What Neuroscientists Think, and Don’t Think, About Consciousness

Frontiers in Human Neuroscience, 2022
The approach the majority of neuroscientists take to the question of how consciousness is generated, it is probably fair to say, is to ignore it. Although there are active research programs looking at correlates of consciousness, and explorations of ...
Peter D. Kitchener, Colin G. Hales
doaj   +1 more source

Boson-boson effective nonrelativistic potential for higher-derivative electromagnetic theories in D dimensions

, 2004
The problem of computing the effective nonrelativistic potential $U_{D}$ for the interaction of charged scalar bosons within the context of D-dimensional electromagnetism with a cutoff, is reduced to quadratures. It is shown that $U_3$ cannot bind a pair
Accioly, Antonio, Dias, Marco
core   +1 more source

Anomalous extinction in index-matched terahertz nanogaps

Nanophotonics, 2018
Slot-type nanogaps have been widely utilized in transmission geometry because of their advantages of exclusive light funneling and exact quantification of near-field enhancement at the gap.
Jeong Jeeyoon, Kim Dasom, Park Hyeong-Ryeol, Kang Taehee, Lee Dukhyung, Kim Sunghwan, Bahk Young-Mi, Kim Dai-Sik   +7 more
doaj   +1 more source

Wideband 0.5–50 GHz double‐ridged guide horn antenna using coaxial‐to‐ridge waveguide launcher

IET Microwaves, Antennas & Propagation
Ever‐increasing bandwidth requirements from various industries drive the need for the ever‐increasing bandwidth of antennas used for testing.
Bennie Jacobs, Johann W. Odendaal, Johan Joubert   +2 more
doaj   +1 more source

Temporal boundaries in electromagnetic materials

New Journal of Physics, 2021
Temporally modulated optical media are important in both abstract and applied situations, such as spacetime transformation optics, relativistic laser–plasma interactions, and dynamic metamaterials. Here we investigate the behaviour of temporal boundaries,
Jonathan Gratus, Rebecca Seviour, Paul Kinsler, Dino A Jaroszynski   +3 more
doaj   +1 more source