Results 121 to 130 of about 47,027 (304)

The Barrett-Crane model: asymptotic measure factor

, 2014
The original spin foam model construction for 4D gravity by Barrett and Crane suffers from a few troubling issues. In the simple examples of the vertex amplitude they can be summarized as the existence of contributions to the asymptotics from non ...
Kaminski, Wojciech, Steinhaus, Sebastian
core   +1 more source

The dual of pure non-Abelian lattice gauge theory as a spin foam model [PDF]

, 2001
Robert Oeckl, Hendryk Pfeiffer
openalex   +1 more source

Cell‐Stress‐Free Percutaneous Bioelectrodes

Advanced Materials, EarlyView.
A structurally adaptive soft microneedle bioelectrode is developed with an effervescent sacrificial core that dissolves after insertion, leaving an ultrathin and highly compliant electrode integrated with skin. This design enables ultra‐flexible, cell‐stress‐free, stable, and high‐fidelity electrophysiological monitoring under dynamic conditions such ...
Jungho Lee, Gaeun Yun, Juhyeong Jeon, Phuong Thao Le, Tae Sik Hwang, Jeongwoo Park, Jin‐Hyeok Baek, Seung Whan Kim, Hyoun Wook Lee, Kisang Kwon, Jihee Kim, Hoon Lim, Chulhong Kim, Sung‐Min Park, Geunbae Lim   +14 more
wiley   +1 more source

(3+1)-dimensional spin foam model of quantum gravity with spacelike and timelike components [PDF]

, 2001
Alejandro Pérez, Carlo Rovelli
openalex   +1 more source

Immersed Halide Perovskite‐Based Electrochemical Cells for Stable Solar Water Splitting: Achievements, Opportunities, and Prospects

Advanced Materials, EarlyView.
Halide perovskites are promising photoabsorbers in solar water‐splitting devices owing to their outstanding optoelectronic properties. This review summarizes advances in encapsulation techniques and material engineering strategies to enhance efficiency and device stability.
Wooyong Jeong, Juwon Yun, Gyumin Jang, Chang‐Seop Jeong, Jooho Moon   +4 more
wiley   +1 more source

EPRL/FK Group Field Theory

, 2010
The purpose of this short note is to clarify the Group Field Theory vertex and propagators corresponding to the EPRL/FK spin foam models and to detail the subtraction of leading divergences of the model.Comment: 20 pages, 2 ...
Ben Geloun J., Ben Geloun J. Gurau R. Rivasseau V., Freidel L., Gurau R., J. Ben Geloun, Krajewski T. Magnen J. Rivasseau V. Tanasa A. Vitale P., Magnen J., Messiah A., Oriti D., Perelomov A., R. Gurau, V. Rivasseau   +11 more
core   +2 more sources

Spin foam model for Lorentzian general relativity [PDF]

, 2001
Alejandro Pérez, Carlo Rovelli
openalex   +1 more source

LQG propagator from the new spin foams

Nuclear Physics B, 2009
28 ...
Claudio Perini, Claudio Perini, Eugenio Bianchi, Elena Magliaro, Elena Magliaro   +4 more
openaire   +4 more sources

Design Strategies and Roles of Hydrogels for Sustainable Energy Conversion and Harvesting from Natural and Biological Environments

Advanced Materials, EarlyView.
This review examines hydrogel‐based technologies driven by environmental stimuli and emphasizes their unique contributions to energy conversion. It provides insights into design strategies and recent advancements in functional hydrogels, highlighting opportunities and challenges in this field.
Wanheng Lu, Wei Li Ong, Xinglong Pan, Zhiwei Li, Guo Tian, Ghim Wei Ho   +5 more
wiley   +1 more source

Group field theory and simplicial gravity path integrals: A model for Holst-Plebanski gravity

, 2011
In a recent work, a dual formulation of group field theories as non-commutative quantum field theories has been proposed, providing an exact duality between spin foam models and non-commutative simplicial path integrals for constrained BF theories.
Aristide Baratin, C. Rovelli, D. Oriti, Daniele Oriti, J. C. Baez, L. Freidel, S. Majid, V. Rivasseau   +7 more
core   +2 more sources