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Many Body in General Relativity: A thermal equivalence principle
Physics > General Physics [Submitted on 31 May 2026] Title:Many Body in General Relativity: A thermal equivalence principle View PDF HTML (experimental)Abstract:We review the physics of many bodies in the context of general relativity. Starting from the stress energy tensor for one body, for a swarm of bodies, for a perfect fluid, we review relativistic hydrodynamics, kinetic theory, and statistical physics of $N$ identical bodies.
Newfound sound wave scattering rule may lead to less bulky, more effective soundproofing
June 8, 2026 report Newfound sound wave scattering rule may lead to less bulky, more effective soundproofing Krystal Kasal Author Gaby Clark Scientific Editor Robert Egan Associate Editor Researchers in China recently uncovered a quantum-inspired rule governing how sound is scattered by certain physical properties of a material. Their research, published in Physical Review Letters, may lead to the ability to design materials with optimal, broadband sound blocking. Rules governing acoustic...
Tabletop experiment helps reconcile fundamental physics
Tabletop experiment helps reconcile fundamental physics Gaby Clark Scientific Editor Andrew Zinin Lead Editor Assistant Professor Haocun Yu is something of a scientific diplomat. In a recent Physical Review Letters publication, she and her colleagues show how a tabletop experiment can bring together two bedrock physics theories that have never been fully reconciled. More than a century ago, Albert Einstein gave us the theory of general relativity, describing gravity in relation to space and...
Cutting a photon in two creates an infinite swarm of particles
June 2, 2026 report Cutting a photon in two creates an infinite swarm of particles Sam Jarman Author Gaby Clark Scientific Editor Robert Egan Associate Editor By definition, elementary particles can't be broken into smaller pieces. But in a new theoretical study published in Physical Review Letters, Johannes Skaar and colleagues have revealed what would happen if you tried anyway for a single photon. The answer is deeply strange: attempting to cut a photon in two wouldn't produce two smaller...
Relativity from the Perspectives of Observers
Announce Type: new Abstract: This paper reviews the role of observers in the development of relativity theory, from special relativity to general relativity, emphasizing that observer-dependent descriptions are as fundamental as the covariance of physical laws. This paper reviews the role of observers in the development of relativity theory, from special relativity to general relativity, emphasizing that observer-dependent descriptions are as fundamental as the covariance of physical laws....
Deep-Earth seismic anomalies may be explained by newly discovered manganese compound
Scientists know that manganese, in its various oxide forms, plays a significant role in Earth's geochemical cycles. However, the exact forms of manganese, their abundance and the mechanisms behind these cycles that occur in Earth's deep, high-pressure interior are not well understood. But, a recent study, published in Physical Review B, reports on a newly discovered manganese rich compound that might help shed light on manganese's behavior in Earth's interior and explain why seismic waves...
Perspective of Fermi's golden rule and its generalizations in chemical physics
Announce Type: replace Abstract: This perspective provides a succinct history of Fermi's golden rule (FGR), overview of its derivation, assumptions, and representative forms. Major applications of FGR, mostly in the field of chemical physics, are reviewed. These illustrate the broad applicability and success of FGR.
Geometric Solution of Turbulence as Diffusion in Loop Space
Announce Type: replace Abstract: Strongly nonlinear dynamics, from fluid turbulence to quantum chromodynamics, have long constituted some of the most challenging problems in theoretical physics. This review describes a unified theoretical framework, the loop space calculus, which offers an analytical approach to these problems. The central idea is a shift in perspective from pointwise fields to integrated loop observables, a transformation that recasts the governing nonlinear equations into...
From Video to Control: A Survey of Learning Manipulation Interfaces from Temporal Visual Data
arXiv:2604.04974v3 Announce Type: replace Abstract: Video is a scalable observation of physical dynamics: it captures how objects move, how contact unfolds, and how scenes evolve under interaction -- all without requiring robot action labels. Yet translating this temporal structure into reliable robotic control remains an open challenge, because video lacks action supervision and differs from robot experience in embodiment, viewpoint, and physical constraints. This survey reviews methods...
From Video to Control: A Survey of Learning Manipulation Interfaces from Temporal Visual Data
Announce Type: replace Abstract: Video is a scalable observation of physical dynamics: it captures how objects move, how contact unfolds, and how scenes evolve under interaction -- all without requiring robot action labels. Yet translating this temporal structure into reliable robotic control remains an open challenge, because video lacks action supervision and differs from robot experience in embodiment, viewpoint, and physical constraints. This survey reviews methods that exploit...