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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.
Water-wave tweezers steer tiny 'surfers' without touching them
Water-wave tweezers steer tiny 'surfers' without touching them Stephanie Baum Scientific Editor Robert Egan Associate Editor Summer brings with it the sight of surfers moving seamlessly across wave crests, with ocean waters carrying them along coastlines. A team of scientists has now created a similar phenomenon—with small objects rather than surfers—that can be controlled by humans rather than by nature. Through a series of experiments on a replicated mini-beach, NYU researchers show how...
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...
Violating the 3rd law of black hole mechanics in vacuum gravity
June 3, 2026 feature Violating the 3rd law of black hole mechanics in vacuum gravity Ingrid Fadelli Author Sadie Harley Scientific Editor Robert Egan Associate Editor Black holes, regions in space where gravity is so strong that nothing can escape, have been widely studied over the past decades, due to their unique and intriguing properties. Einstein's theory of general relativity predicts that black holes obey a set of rules, known as the laws of black hole mechanics. These rules somewhat...
Fluctuation-induced and quantum effects in nanofluidic transport
arXiv:2606.06693v1 Announce Type: new Abstract: The hydrodynamic wall has traditionally been considered a featureless object, whose only role is to provide a boundary for fluid flow. Yet, there is now ample evidence that at nanometer scales, liquid flows are sensitive to the wall's internal -- in particular, electronic -- degrees of freedom. Here, after reviewing the experimental evidence for nanoscale liquid-electron couplings, we present the theoretical advances that have allowed for their...
From Electroculture to Plasma Agriculture: A Three-Century Arc Bridging Bertholon's Legacy with Contemporary Farming Advances
Announce Type: new Abstract: This review traces the historical trajectory of electricity in agriculture, from the earliest observations of electrical phenomena to the emergence of cold plasmas. Looking back to Antiquity and then to the Enlightenment, it underlines Abb\'e Bertholon's 18th-century efforts to channel atmospheric electricity to stimulate crops, using devices such as the electro-v\'eg\'etom\`etre. Although these early electroculture experiments relied on neither quantitative...
The Scariest Monster on Broadway
The malefactors in Roald Dahl’s fiction are easy to spot. “If a person has ugly thoughts, it begins to show on the face,” the author writes in The Twits. “And when that person has ugly thoughts every day, every week, every year, the face gets uglier and uglier until you can hardly bear to look at it.”
Advancing Fluid Antenna-Assisted Non-Terrestrial Networks in 6G and Beyond: Fundamentals, State of the Art, and Future Directions
Announce Type: replace Abstract: With the surging demand for ultra-reliable, low-latency, and ubiquitous connectivity in Sixth-Generation (6G) networks, Non-Terrestrial Networks (NTNs) emerge as a key complement to terrestrial networks by offering flexible access and global coverage. Despite the significant potential, NTNs still face critical challenges, including dynamic propagation environments, energy constraints, and dense interference. As a key 6G technology, Fluid Antennas (FAs) can...
Groundbreaking blood test could detect Alzheimer's disease '17 years early'
Groundbreaking blood test could detect Alzheimer's disease '17 years early' This sensor could also predict the likelihood of developing Parkinson's disease An experimental blood test could detect a devastating disease almost two decades before a typical diagnosis. A new report has found that this test could predict Alzheimer’s disease 17 years earlier than usual. The findings, published in the Journal of Physical Chemistry B, also suggest that this test could detect Parkinson’s disease early.
Ex teacher, 55, drops 2 dress sizes without 'giving up anything' on 80% off app
Ex teacher, 55, drops 2 dress sizes without 'giving up anything' on 80% off app With a long history of weight cycling, Sam Matthews used the Simple app to lose weight and improve her long term health goals As temperatures rise, so does the pressure to get 'beach-ready', putting body confidence firmly in the spotlight. While summer often inspires people to swap old habits for new fitness goals, constantly jumping on the bandwagon of another 'fad diet' can feel exhausting. It’s no surprise,...