Results 51 to 60 of about 8,564,290 (196)

Higher spin gravity (Encyclopedia of Mathematical Physics)

, 2023
Invited contribution to the section 2 ``Classical and Quantum Gravity'' of the volume 1 of the second edition of Encyclopedia of Mathematical Physics (Elsevier, 2025)Key features of higher-spin extensions of ordinary gravity are briefly reviewed.
Bekaert, Xavier
core   +1 more source

Autonomous Folding of Soft Matter From Living Polymers

Advanced Materials, EarlyView.
Origami structures are endowed with “living” polymer creases that grow, remodel, and stiffen in response to nutrient solutions. This post‐fabrication growth enables autonomous folding, iterative regrowth, and mechanical tuning involving origami assemblies, such as cranes, Miura‐ori tessellations, rigid and non‐rigid square‐twist patterns, establishing ...
Jiahe Huang, Tuo Zhao, Shixi Zang, Deep Malu, Huajian Ji, Glaucio H. Paulino, Yuhang Hu   +6 more
wiley   +1 more source

Higher-spin self-dual Yang-Mills and gravity from the twistor space

Journal of High Energy Physics, 2023
We lift the recently proposed theories of higher-spin self-dual Yang-Mills (SDYM) and gravity (SDGR) to the twistor space. We find that the most natural room for their twistor formulation is not in the projective, but in the full twistor space, which is ...
Yannick Herfray, Kirill Krasnov, Evgeny Skvortsov   +2 more
doaj   +1 more source

Higher-dimensional black holes: Braneworld stars and Hawking radiation. [PDF]

, 2007
In this thesis two aspects of braneworld models are studied. A new attempt at finding the metric of a braneworld black hole within the second Randall-Sundrum model is explored. Branes containing distributions of perfect fluid are embedded in a variety of
Creek, Simon
core  

Bioinspired Adaptive Surfaces for Intelligent Liquid Manipulation: Progressing From Passive and Active to Hybrid Strategies

Advanced Materials, EarlyView.
This review examines passive, active, and hybrid liquid manipulation strategies, highlighting hybrid approaches as an emerging route to reconcile energy efficiency with adaptive control. By actively reconstructing passive surfaces to store programmable interfacial energy, hybrid systems enable flexible yet low‐power liquid transport, with perspectives ...
Jiaqi Miao, Yiyuan Zhang, Liqiu Wang, Alan C. H. Tsang   +3 more
wiley   +1 more source

Planar solutions of higher-spin theory. Part I. Free field level

Journal of High Energy Physics, 2021
Many black hole solutions of General Relativity are known to be linearly exact. This opens a way to study them in gauge theories that apart from gravity contain fields of higher spin s > 2.
V. E. Didenko, A. V. Korybut
doaj   +1 more source

(2+1) gravity for higher genus in the polygon model [PDF]

, 2004
We construct explicitly a (12g − 12)-dimensional space P of unconstrained and independent initial data for ’t Hooft’s polygon model of (2+1) gravity for vacuum spacetimes with compact genus-g spacelike slices, for any g ≥ 2.
Kádár, Zoltán, Kadar, Z., Dep Natuurkunde, Quantum Gravity, Strings and Elementary Particles, Loll, R., Universiteit Utrecht   +5 more
core   +2 more sources

Liquid Crystal Elastomer‐Based Haptic Pixel Arrays at Your Fingertips for Advanced Human–Machine Interfaces

Advanced Materials, EarlyView.
We mechanically program liquid crystal elastomer coatings as a stimuli‐responsive and digitally addressable platform for refreshable tactile displays; we validate the perceptual performance of our dynamic device matches conventional static tactile media.
Tom Bruining, Enjun Lin, Yu Zou, Meike Heldoorn, Pengrong Lyu, Samuël A. M. Weima, Astrid M. L. Kappers, Myrthe A. Plaisier, Satoshi Aya, Danqing Liu   +9 more
wiley   +1 more source

Strong homotopy algebras for chiral higher spin gravity via Stokes theorem

Journal of High Energy Physics
Chiral higher spin gravity is defined in terms of a strong homotopy algebra of pre-Calabi-Yau type (noncommutative Poisson structure). All structure maps are given by the integrals over the configuration space of concave polygons and the first two maps ...
Alexey Sharapov, Evgeny Skvortsov, Richard Van Dongen   +2 more
doaj   +1 more source

Fast Hydrogel Micro‐Actuators Driven by Electric Fields

Advanced Materials, EarlyView.
We report the fabrication of chemically programmable electroactuating microstructures through the first integration of two‐photon polymerization with electrically actuated gelatin methacrylate‐based hydrogels. By tailoring the charge of the polymer network, we demonstrate programmable polarity‐dependent bending, enabling microstructures that ...
Annaël Sort‐Montenegro, Jason M. Delente, Žiga Roblek, Yekaterina Tskhe, Luke Dowling, Colm Delaney, Larisa Florea   +6 more
wiley   +1 more source