Results 61 to 70 of about 5,317 (165)
Fortschritte der Physik, Volume 74, Issue 6, June 2026.ABSTRACT We present a clear, step‐by‐step method for counting degrees of freedom and identifying constraints in general field theories. This approach, grounded in the works of Einstein, Hilbert, Cartan, Kuranishi, and, more recently, Seiler, is neither Lagrangian nor Hamiltonian in nature. Instead, it applies directly to the field equations. We offer a
Lavinia Heisenberg
wiley +1 more source
Transient Porosity During Fluid‐Mineral Interaction. Part 1: In Situ 4D Tomography
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 6, June 2026.Abstract Fluid‐induced mineral replacement reactions play a key role in controlling porosity generation and permeability evolution in geologic systems. However, the dynamic feedback between pore structure development and fluid transport remains poorly quantified. This study investigates the spatiotemporal evolution of reaction‐induced pore space in the
Hamed Amiri +7 more
wiley +1 more source
Universe, 2016 The existence of singularities alerts that one of the highest priorities of a centennial perspective on general relativity should be a careful re-thinking of the validity domain of Einstein’s field equations.
Elias Zafiris
doaj +1 more source
Thin-shell wormholes in de Rham–Gabadadze–Tolley massive gravity
European Physical Journal C: Particles and Fields, 2020 In this work, we study the thin-shell wormholes in dRGT massive gravity. In order to glue two bulks of the spacetime geometry, we first derive junction conditions of the dRGT spacetime.
Takol Tangphati +3 more
doaj +1 more source
Water Resources Research, Volume 62, Issue 6, June 2026.Abstract Predictive models for reactive flow in fractured media often adopt single‐mineral simplifications, neglecting feedback between mineralogical heterogeneity and hydrological evolution. This study investigates the pore‐scale dynamics of fracture evolution in dual‐mineral systems characterized by contrasting mineral reactivities and morphologies ...
Heewon Jung, Sunwong Lim
wiley +1 more source
Dependence of Mineral Dissolution Rates on Two‐Phase Hydrodynamics in Single Pores
Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.Abstract Multiphase flow and mineral reactions co‐exist in many subsurface systems, and thus elucidating and quantifying the impacts of multiphase flow on mineral reaction rates are crucial. Our study established a benchmark experiment on calcite dissolution in cylindrical pores in slug flow, and performed a series of simulations using a validated pore‐
Xin Wang, Hang Deng
wiley +1 more source
Wormhole Restrictions from Quantum Energy Inequalities
UniverseWormhole solutions, bridges that connect different parts of spacetime, were proposed early in the history of General Relativity. Soon after, it was shown that all wormholes violate classical energy conditions, which are non-negativity constraints on ...
Eleni-Alexandra Kontou
doaj +1 more source
On the properties of stationary configurations of a rotating self-gravitating ideal fluid with a vortex gravitational field [PDF]
Известия Саратовского университета. Новая серия: ФизикаBackground and Objectives: Within the framework of Einstein’s general-relativistic theory of gravity, that is, the general theory of relativity (GR), the properties of stationary distributions of a self-gravitating rotating continuous medium in the
Krechet, Vladimir G. +2 more
doaj +1 more source
Advances in Solid‐Phase Processing Techniques: Innovations, Applications, and Future Perspectives
Advanced Materials Technologies, Volume 11, Issue 9, 6 May 2026.Based on practical manufacturing challenges, this review examines advanced solid‐phase processing techniques that overcome the inherent limitations of conventional melting‐based and traditional solid‐phase manufacturing, enabling the production of higher‐performance components at reduced cost through process innovation and improved supply‐chain ...
Tianhao Wang
wiley +1 more source
Deforming the Double‐Scaled SYK and Reaching the Stretched Horizon From Finite Cutoff Holography
Fortschritte der Physik, Volume 74, Issue 5, May 2026.ABSTRACT We study the properties of the double‐scaled SYK (DSSYK) model under chord Hamiltonian deformations based on finite cutoff holography for general dilaton gravity theories with Dirichlet boundaries. The formalism immediately incorporates a lower‐dimensional analog of TT¯(+Λ2)$\text{T}\overline{\text{T}}(+\Lambda _2)$ deformations, denoted T2 ...
Sergio E. Aguilar‐Gutierrez
wiley +1 more source