Results 111 to 120 of about 47,027 (304)
Ponzano-Regge model revisited III: Feynman diagrams and Effective field theory
, 2005 We study the no gravity limit G_{N}-> 0 of the Ponzano-Regge amplitudes with massive particles and show that we recover in this limit Feynman graph amplitudes (with Hadamard propagator) expressed as an abelian spin foam model.
Akhmedov E T +26 more
core +2 more sources
NEW SPIN FOAM MODELS OF QUANTUM GRAVITY [PDF]
Modern Physics Letters A, 2005 We give a brief and a critical review of the Barret-Crane spin foam models of quantum gravity. Then we describe two new spin foam models which are obtained by direct quantization of General Relativity and do not have some of the drawbacks of the Barret-Crane models.
openaire +5 more sources
Toward Zero‐Excess Alkali Metal Batteries: Bridging Experimental and Computational Insights
Advanced Materials, EarlyView.This review explores zero‐excess alkali metal batteries, highlighting anode–electrolyte interfaces, metal nucleation, dendrite growth, and SEI formation while comparing Li, Na, and K metals. It critically examines electrolyte and separator roles, emphasizing substrate design, electrolyte modifications, interfacial engineering, and solid‐state ...
Pan He +6 more
wiley +1 more source
Active Fabric Origami Enabled by Digital Embroidery of Magnetic Yarns
Advanced Materials, EarlyView.This study demonstrates a scalable textile manufacturing process that fabricates active origami fabrics (AFO) via digital embroidery of magnetic yarns. The programmable AFO exhibits reversible 2D and 3D transformations under magnetic fields, enabling functionalities such as altering surface roughness and linear actuation.
Haiqiong Li +3 more
wiley +1 more source
On background-independent renormalization of spin foam models [PDF]
Classical and Quantum Gravity, 2016 23 pages, 12 figures, updated ...
openaire +5 more sources
Probiotic‐Based Materials as Living Therapeutics
Advanced Materials, EarlyView.Recent advances in Engineered Living Materials are highlighted, integrating synthetic biology and advanced materials, with a focus on probiotic‐based therapeutics. Probiotic Living Materials hold great potential for biosensing, infection treatment, osteogenesis, wound healing, vaginal and gastrointestinal disorders, and cancer therapy. breakthroughs in
Laura Sabio +2 more
wiley +1 more source
Geometric spin foams, Yang-Mills theory and background-independent models
, 2005 We review the dual transformation from pure lattice gauge theory to spin foam models with an emphasis on a geometric viewpoint. This allows us to give a simple dual formulation of SU(N) Yang-Mills theory, where spin foam surfaces are weighted with the ...
Conrady, Florian
core +2 more sources
Gluing 4-simplices: A derivation of the Barrett-Crane spin foam model for Euclidean quantum gravity [PDF]
, 2000 Daniele Oriti, Ruth M. Williams
openalex +1 more source
Ce Single Atom‐Engineered Amorphous/Crystalline Nanosheets for Enhanced Alkaline Water Electrolysis
Advanced Materials, EarlyView.We leveraged Ce single‐atom engineering to generate short‐range ordered crystalline nanodomains in amorphous RuOx for creating amorphous/crystalline nanojunctions, in an effort to regulate the water dissociation kinetics for enhanced HER. Specifically, the Ce‐doped crystalline nanodomains greatly reduce the energy barrier to water dissociation and ...
Xinyu Chen +10 more
wiley +1 more source
Advanced Materials, EarlyView.Biological and biologically‐inspired functional nanostructures with structural, thermal, optical, and sensing applications are reviewed. The role of nanoscale features in biological materials on performance is described, and their blueprints are used for bio‐inspired nanomaterials, synthesized using advanced techniques (i.e., photolithography, bio ...
Chao Hsuan (Joseph) Sung +15 more
wiley +1 more source