Results 111 to 120 of about 173,760 (383)

Beyond the Standard Model with noncommutative geometry, strolling towards quantum gravity

, 2015
Noncommutative geometry, in its many incarnations, appears at the crossroad of various researches in theoretical and mathematical physics: from models of quantum space-time (with or without breaking of Lorentz symmetry) to loop gravity and string theory,
Martinetti, Pierre
core   +1 more source

Synthetic Aspects and Characterization Needs in MOF Chemistry – from Discovery to Applications

Advanced Materials, EarlyView.
Overcoming the challenges of phase discovery, synthesis optimization and scale‐up, characterization, and computational studies is essential to accelerate the large‐scale application of MOFs. Life‐cycle analyses and techno‐economic analyses need to be performed to realistically assess their potential for industrial relevance.
Bastian Achenbach, Aysu Yurdusen, Norbert Stock, Guillaume Maurin, Christian Serre   +4 more
wiley   +1 more source

Adsorption and Separation by Flexible MOFs

Advanced Materials, EarlyView.
Flexible metal–organic frameworks (MOFs) present significant potential for gas storage and separation due to their structural dynamic. This review explores the rationale behind the flexible MOFs' enhanced working capacity and separation factors. It also addresses key challenges, including phase transition kinetics, crystal robustness, cycling, shaping,
Irena Senkovska, Volodymyr Bon, Antonia Mosberger, Yutong Wang, Stefan Kaskel   +4 more
wiley   +1 more source

Dilaton gravity, Poisson sigma models and loop quantum gravity [PDF]

Classical and Quantum Gravity, 2009
31 ...
Martin Bojowald, Juan D. Reyes
openaire   +3 more sources

Unitarity bounds on low scale quantum gravity

, 2010
We study the unitarity of models with low scale quantum gravity both in four dimensions and in models with a large extra-dimensional volume. We find that models with low scale quantum gravity have problems with unitarity below the scale at which gravity ...
A. Datta, A. Simone De, A. Vayonakis, B. Grzadkowski, B. Grzadkowski, B.S. DeWitt, C. Amsler, C.P. Burgess, C.T. Hill, D.N. Kabat, D.V. Vassilevich, F. Larsen, F.A. Berends, F.L. Bezrukov, H. Dam van, I. Antoniadis, I. Antoniadis, J. Chakrabortty, J. Hewett, J.L.F. Barbon, K. Huitu, K. Tobe, L. Randall, L.A. Anchordoqui, L.J. Hall, M. Kachelriess, M.T. Grisaru, Michael Atkins, N. Arkani-Hamed, Q. Shafi, S. Hannestad, S. Hannestad, S.R. Huggins, T. Dasgupta, T. Han, T.G. Rizzo, V.I. Zakharov, X. Calmet, X. Calmet, X. Calmet, X. Calmet, X. Calmet, X. Calmet, X. Calmet, X. Calmet, X. Calmet, X. Calmet, X. Calmet, X. Calmet, X.G. He, Xavier Calmet   +50 more
core   +2 more sources

Advances in Photonic Materials and Integrated Devices for Smart and Digital Healthcare: Bridging the Gap Between Materials and Systems

Advanced Materials, EarlyView.
This article summarizes significant technological advancements in materials, photonic devices, and bio‐interfaced systems, which demonstrate successful applications for impacting human healthcare via improved therapies, advanced diagnostics, and on‐skin health monitoring.
Seunghyeb Ban, Hoon Yi, Jaejin Park, Yunuo Huang, Ki Jun Yu, Woon‐Hong Yeo   +5 more
wiley   +1 more source

Towards an UV fixed point in CDT gravity

Journal of High Energy Physics, 2019
CDT is an attempt to formulate a non-perturbative lattice theory of quantum gravity. We describe the phase diagram and analyse the phase transition between phase B and phase C (which is the analogue of the de Sitter phase observed for the spherical ...
J. Ambjørn, J. Gizbert-Studnicki, A. Görlich, J. Jurkiewicz, D. Németh   +4 more
doaj   +1 more source

Pregeometry and spontaneous time-space asymmetry

Journal of High Energy Physics, 2022
In pregeometry a metric arises as a composite object at large distances. We investigate if its signature, which distinguishes between time and space, could be a result of the dynamics rather than being built in already in the formulation of a model.
C. Wetterich
doaj   +1 more source

Dynamics for a 2-vertex quantum gravity model [PDF]

Classical and Quantum Gravity, 2010
We use the recently introduced U(N) framework for loop quantum gravity to study the dynamics of spin network states on the simplest class of graphs: two vertices linked with an arbitrary number N of edges. Such graphs represent two regions, in and out, separated by a boundary surface.
Enrique F. Borja, Enrique F. Borja, Etera R. Livine, Iñaki Garay, Jacobo Díaz-Polo   +4 more
openaire   +4 more sources

The Feynman propagator for quantum gravity: spin foams, proper time, orientation, causality and timeless-ordering

, 2004
We discuss the notion of causality in Quantum Gravity in the context of sum-over-histories approaches, in the absence therefore of any background time parameter.
Oriti, Daniele
core   +4 more sources