Results 61 to 70 of about 31,605 (318)

High frequency electrical oscillations in cavities

Mathematical Modelling and Analysis, 2018
If the interior of a conducting cavity (such as a capacitor or a coaxial cable) is supplied with a very high-frequency electric signal, the information between the walls propagates with an appreciable delay, due to the finiteness of the speed of light ...
Daniele Funaro
doaj   +1 more source

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

A Smart Magnetically Actuated Flip‐Disc Programmable Metasurface with Ultralow Power Consumption for Real‐Time Channel Control

Advanced Functional Materials, EarlyView.
The study proposes a 1‐bit programmable metasurface based on flip‐disc display, named flip‐disc metasurface (FD‐MTS). This new design enables ultralow energy consumption while maintaining coding patterns. It also exhibits high scalability and multifunctional flexibility.
Jiang Han Bao, Che Liu, Jia Cheng Li, Zhen Hao Fu, Yi Su Huang, Si Qi Huang, Lei Zhang, Jian Wei You, Tie Jun Cui   +8 more
wiley   +1 more source

The classical equations of motion of quantized gauge theories, Part 2: Electromagnetism

Physics Letters B
In this and companion papers, we show that quantum field theories with gauge symmetries permit a broader class of classical dynamics than typically assumed.
David E. Kaplan, Tom Melia, Surjeet Rajendran   +2 more
doaj   +1 more source

The hidden geometry of electromagnetism

, 2015
Nearly all field theories suffer from singularities when particles are introduced. This is true in both classical and quantum physics. Classical field singularities result in the notorious self-force problem, where it is unknown how the dynamics of a ...
Cohen, Eliahu, Elitzur, Avshalom C., Hadad, Yaron, Kaminer, Ido   +3 more
core   +1 more source

Advances in Stimuli‐Responsive Organic Materials and Polymers toward Intelligent CO2 Capture

Advanced Functional Materials, EarlyView.
Schematic illustration of the relationship between different stimuli and stimuli‐responsive organic materials and polymers for carbon dioxide (CO2) capture. Main stimuli include redox, pH, magnetism, temperature, light, and pressure. Furthermore, multi‐responsive materials, due to their high adaptability and scalability in complex environments, are ...
Jian Zhou, Marc Deissenroth‐Uhrig, Markus Gallei   +2 more
wiley   +1 more source

Force-Free Gravitational Redshift: Proposed Gravitational Aharonov-Bohm experiment

, 2012
We propose a feasible laboratory interferometry experiment with matter waves in a gravitational potential caused by a pair of artificial field-generating masses. It will demonstrate that the presence of these masses (and, for moving atoms, time dilation)
A. Batelaan, A. Zeilinger, Anton Zeilinger, Brian Estey, H. Rauch, Holger Müller, Michael A. Hohensee, Paul Hamilton   +7 more
core   +1 more source

Novel Bioconjugate Materials: Synthesis, Characterization and Medical Applications

Advanced Healthcare Materials, EarlyView.
This review discusses the bioconjugation of novel materials grouped under “biological”, “hybrid” and “synthetic” categories. Medical applications ranging from cancer therapy and diagnostics to optogenetics and tissue engineering are explored, and conjugation trends are highlighted as a general guide. The review concludes with a comparison of techniques
Ellie Martin, Sean P. Doidge, Eiman Aleem, Suela Kellici, Steven Dunn, Claire Atkinson, Philip D. Howes   +6 more
wiley   +1 more source

Galilean Covariance versus Gauge Invariance [PDF]

, 2009
We demonstrate for the first time and unexpectedly that the Principle of Relativity dictates the choice of the "gauge conditions" in the canonical example of a Gauge Theory namely Classical Electromagnetism.
Rousseaux, Germain
core   +2 more sources

Seeing the light : experimental signatures of emergent electromagnetism in a quantum spin ice

, 2012
The "spin ice" state found in the rare earth pyrochlore magnets Ho2Ti2O7 and Dy2Ti2O7 offers a beautiful realisation of classical magnetostatics, complete with magnetic monopole excitations.
K. Penc, L.-J. Chang, Nic Shannon, Olga Sikora, Owen Benton   +4 more
core   +1 more source