The RBM method is used to numerically simulate the overall scheme of the hull-propeller-rudder interaction. The advantage is that it can simulate the mechanical interaction between the propeller and the hull-rudder with acceptable accuracy. The…
Category: 4. Physics
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Photon acceleration of high-intensity vector vortex beams into the extreme ultraviolet
Photon-accelerated vector vortex beams
In a photon accelerator, a moving refractive index gradient alters the local phase velocity of a light wave. If the light wave co-travels with a negative (positive) refractive index gradient in a normally…
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Ultra-thin lenses that make infrared light visible
Lenses are the most widely used optical devices. Camera lens or objectives, for example, produce a sharp photo or video by directing light at a focal point. The speed of evolution made in the field of optics in recent decades is exemplified by…
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Precision Spectroscopy Reaffirms Gap Between Theory and Experiment
• Physics 18, 110
New physics may explain discrepant values for the ionization energy of a metastable state of helium.
A. T. Bondy/Drake…
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Dynamic nanodomains dictate macroscopic properties in lead halide perovskites
Synthesis of perovskite single crystals
MAPbBr3: a mixture of 1-M PbBr2 and 1-M MABr was dissolved in 1-ml DMF. To ensure complete dissolution, the solution was stirred vigorously at 25 °C for 6 h and then filtered with a 0.45-μm filter head…
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Purely vision-based collective movement of robots
Pavlov, D. et al. Patterns and mechanisms of schooling behavior in fish: a review. J. Ichthyol. 40, S163 (2000).
King, A. J. & Sumpter, D. J. Murmurations. Curr. Biol. 22, R112–R114 (2012).
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Experimental quantum-enhanced kernel-based machine learning on a photonic processor
Wehner, S., Elkouss, D. & Hanson, R. Quantum internet: a vision for the road ahead. Science 362, eaam9288 (2018).
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Georgescu, I. M., Ashhab, S. & Nori,…
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Spectral physical unclonable functions: downscaling randomness with multi-resonant hybrid particles
Au/Si particles: laser fabrication and bright luminescence
Hybrid metal-dielectric systems are recognized as versatile nanophotonic platforms, whose diverse combinations unlock extraordinary optical features31,32,33,34,35. To develop robust…
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Precision is not limited by the second law of thermodynamics
Here, we provide additional detail regarding the continuum description of the wave-packet preparation, how to determine clock precision \({{{\mathcal{N}}}}_{\varSigma }\) and \({{{\mathcal{N}}}}_{\infty }\) from the Lindbladian, and how the…
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DEM-CFM analysis of Lode angle influence on the undrained cyclic behavior of anisotropically consolidated soils
Chai, J.-C. & Miura, N. Traffic-load-induced permanent deformation of road on soft subsoil. J. Geotech. Geoenviron. Eng. 128(11), 907–916 (2002).
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Ishihara, K. Evaluation of soil…
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