Results 81 to 90 of about 167,327,776 (267)

Dimensional reduction of the S 3/WZW duality

Journal of High Energy Physics
Recently proposed duality relates the critical level limit $$\widehat{k}\to -2$$ of $${\text{SU}}{\left(2\right)}_{\widehat{k}}$$ WZW models to a classical three-dimensional Einstein gravity on a sphere.
Kenta Suzuki, Yusuke Taki
doaj   +1 more source

On the Structure of the Vacuum in Quantum Gravity: A View from the Asymptotic Safety Scenario

Universe, 2019
Although the Asymptotic Safety scenario is one of the most promising approaches to quantum gravity, little attention has been devoted to the issue of the vacuum state.
Alfio Bonanno
doaj   +1 more source

International trade without CES : estimating translog gravity [PDF]

, 2010
This paper derives a micro-founded gravity equation in general equilibrium based on a translog demand system that allows for endogenous markups and substitution patterns across goods. In contrast to standard CES-based gravity equations, trade is more
Novy, Dennis
core  

Time in quantum gravity [PDF]

, 2012
Quantum gravity--the marriage of quantum physics with general relativity--is bound to contain deep and important lessons for the nature of physical time.
Vistarini, Tiziana, Tiziana Vistarini, Christian Wüthrich, Wuthrich, Christian, Huggett, Nick, Nick Huggett   +5 more
core   +1 more source

UCST‐Driven Shape Morphing in Digital Light Processing 4D‐Printed Hydrogels

Advanced Materials Technologies, EarlyView.
A DLP‐printable UCST hydrogel based on poly(acrylic acid‐co‐acrylamide) enables reversible thermally induced expansion and 4D shape morphing. Rational control of composition, porosity, and multimaterial architecture enables predictable 4D shape morphing through differential swelling and localized actuation, opening new opportunities for high‐resolution
Fato Niang, Vincent Lapinte, Sebastien Blanquer   +2 more
wiley   +1 more source

Can Neutron Star Tidal Effects Obscure Deviations from General Relativity?

The Astrophysical Journal
One of the main goals of gravitational-wave astrophysics is to study gravity in the strong-field regime and constrain deviations from general relativity (GR).
Stephanie M. Brown, Badri Krishnan, Rahul Somasundaram, Ingo Tews   +3 more
doaj   +1 more source

Presentism and Quantum Gravity [PDF]

, 2001
There is a philosophical tradition of arguing against presentism, the thesis that only presently existing things exist, on the basis of its incompatibility with fundamental physics.
Monton, Bradley
core  

Hybrid Additive Manufacturing of Highly Stretchable Bottlebrush Polymer Nanocomposites by Decoupled Extrusion and Photopatterning

Advanced Materials Technologies, EarlyView.
A Hybrid Direct Ink Writing–Digital Light Processing (HDD) strategy decouples material extrusion from shape definition, enabling high‐fidelity additive manufacturing of highly viscous, yield‐stress polymer nanocomposites. Excess ink acts as a removable, self‐supporting scaffold, allowing fabrication of unsupported and embedded complex architectures ...
Shahryar Ramezani Bajgiran, Emmanuel Oduro, Daniel A. Rau, Li‐Heng Cai   +3 more
wiley   +1 more source

Meso-inflationary Peccei–Quinn Symmetry Breaking with Nonminimal Coupling

The Astrophysical Journal Supplement Series
We study a realization of the inflationary scenario where the Peccei–Quinn (PQ) symmetry is spontaneously broken during inflation, facilitated by its nonminimal coupling to gravity.
Yermek Aldabergenov, Ding Ding, Wei Lin, Yidun Wan   +3 more
doaj   +1 more source

Can chaos be observed in quantum gravity?

Physics Letters B, 2017
Full general relativity is almost certainly ‘chaotic’. We argue that this entails a notion of non-integrability: a generic general relativistic model, at least when coupled to cosmologically interesting matter, likely possesses neither differentiable ...
Bianca Dittrich, Philipp A. Höhn, Tim A. Koslowski, Mike I. Nelson   +3 more
doaj   +1 more source