Results 61 to 70 of about 455,834 (341)

Gravitational dynamics from collective field theory

Journal of High Energy Physics, 2023
We consider the relevance of a collective field theory description for the AdS/CFT correspondence. Collective field theory performs a systematic reorganization of the degrees of freedom of a (non-gravitational) field theory, replacing the original loop ...
Robert de Mello Koch
doaj   +1 more source

Gravitating global defects: The gravitational field and compactification [PDF]

Physical Review D, 2001
We give a prescription to add the gravitational field of a global topological defect to a solution of Einstein's equations in an arbitrary number of dimensions. We only demand that the original solution has a O(n) invariance with n greater or equal 3. We will see that the general effect of a global defect is to introduce a deficit solid angle.
openaire   +2 more sources

Topology and Material Optimization in Ultra‐Soft Magneto‐Active Structures: Making Advantage of Residual Anisotropies

Advanced Materials, EarlyView.
Residual magnetization induces pronounced mechanical anisotropy in ultra‐soft magnetorheological elastomers, shaping deformation and actuation even without external magnetic fields. This study introduces a computational‐experimental framework integrating magneto‐mechanical coupling into topology optimization for designing soft magnetic actuators with ...
Carlos Perez‐Garcia, Rogelio Ortigosa, Jesús Martínez‐Frutos, Daniel Garcia‐Gonzalez   +3 more
wiley   +1 more source

Gravitational wave generation and detection in gravitational quantum field theory

European Physical Journal C: Particles and Fields
We investigate the production and detection of gravitational waves (GWs) within the framework of gravitational quantum field theory (GQFT). In this theory, GWs exhibit five propagating modes: one scalar, two vector, and two tensor modes.
Yuan-Kun Gao, Da Huang, Yue-Liang Wu
doaj   +1 more source

Multi‐scale Engineered Vasculature and Hierarchical Porosity via Volumetric Bioprinting‐Guided Photopolymerization‐Induced Phase Separation

Advanced Materials, EarlyView.
Vascularization in bioprinted hydrogels is limited by nanoscale porosity in hydrogel bionks. Volumetric bioprinting of gelatin–norbornene phase‐separating hydrogels permits to create centimeter‐scale constructs featuring interconnected multi‐scale porosity. Light dose gradients result in spatially controlled pore dimensions. Capillary‐scale vessels are
Oksana Y. Dudaryeva, Maj‐Britt Buchholz, Gabriel Größbacher, Sofia Amaral, Sammy Florczak, Camille Bonhomme, Alvaro Rojo Ferrer, Mark W. Tibbitt, Riccardo Levato   +8 more
wiley   +1 more source

Localizing the Energy and Momentum of Linear Gravity

, 2010
A framework is developed which quantifies the local exchange of energy and momentum between matter and the linearized gravitational field. We derive the unique gravitational energy-momentum tensor consistent with this description, and find that this ...
Butcher, Luke M., Hobson, Michael, Lasenby, Anthony   +2 more
core   +1 more source

Enhancing Grayscale E‐Beam Lithography: Thermal Treatment of Novolak‐Based Resist for 3D Nanostructures

Advanced Materials Interfaces, EarlyView.
Surface roughness and chemistry of novolak‐based grayscale resists are dependent on both exposure dose and post‐exposure thermal treatment. The observed trends align with the viscoelastic phase separation model and underscore the need to consider both thermodynamic and kinetic factors in resist processing. By tailoring thermal treatment, it is possible
Rahul Singh, Christian Vinther Bertelsen, Neeti Kalyani, Maria Dimaki, Winnie Edith Svendsen   +4 more
wiley   +1 more source

Post-Newtonian limit: second-order Jefimenko equations

European Physical Journal C: Particles and Fields, 2020
The purpose of this paper is to get second-order gravitational equations, a correction made to Jefimenko’s linear gravitational equations. These linear equations were first proposed by Oliver Heaviside in [1], making an analogy between the laws of ...
David Pérez Carlos, Augusto Espinoza, Andrew Chubykalo   +2 more
doaj   +1 more source

Gravitational perturbations of the Higgs field

, 2017
We study the possible effects of classical gravitational backgrounds on the Higgs field through the modifications induced in the one-loop effective potential and the vacuum expectation value of the energy-momentum tensor.
Albareti, Franco D., Maroto, Antonio L., Prada, Francisco   +2 more
core   +1 more source

Strategies for Enhancing Thermal Conductivity of PDMS in Electronic Applications

Advanced Materials Technologies, EarlyView.
This review explores effective strategies for enhancing heat dissipation in Polydimethylsiloxane (PDMS)‐based composites, focusing on particle optimization, 3D network design, and multifunctional integration. It offers key insights into cutting‐edge methods and simulations that are advancing thermal management in modern electronic devices.
Xiang Yan, Marisol Martin‐Gonzalez
wiley   +1 more source