Tootfinder

Search for Dark Matter Scattering from Optically Levitated Nanoparticles
Yu-Han Tseng, T. W. Penny, Benjamin Siegel, Jiaxiang Wang, David C. Moore
https://arxiv.org/abs/2508.00815

Search for Dark Matter Scattering from Optically Levitated Nanoparticles
The development of levitated optomechanics has enabled precise force sensors that operate in the quantum measurement regime, opening up unique opportunities to search for new physics whose weak interactions may have evaded existing sensors. We demonstrate the detection of impulsive forces acting on optically levitated nanoparticles, where the dominant noise source is provided by measurement backaction. Using these sensors, we search for momentum transfers that may originate from scattering of p…

Palantir reports Q2 revenue up 48% YoY to $1B, vs. $940M expected, and boosts full-year outlook guidance to $4.14B-$4.15B, up from $3.89B-$3.90B (Samantha Subin/CNBC)
https://www.cnbc.com/2025/08/04/palantir-pltr-q2-earnings-2025.html

Palantir tops $1 billion in revenue for the first time, boosts guidance
Palantir surpassed Wall Street's estimates and lifted its full-year outlook.

Levitated macroscopic rotors with 10 hours of free spin at room temperature
Xianfeng Chen, Nirmala Raj, Ruvi Lecamwasam, Mingxi Chen, Christina Yuan Ling Tan, Syed M. Assad, Ping Koy Lam
https://arxiv.org/abs/2506.03803

Levitated macroscopic rotors with 10 hours of free spin at room temperature
Low-dissipation rotors with large angular momentum are essential for precision sensing and probing macroscopic quantum phenomena. To date, low dissipation can only be achieved for micro-scale rotors. Here, we report a diamagnetically levitated millimeter-scale rotor exhibiting a measured dissipation rate as low as $3.85\,μ\mathrm{Hz}$ at room temperature, corresponding to a free spinning duration exceeding 10 hours. The rotor is levitated stably over an axisymmetric permanent magnet trap, and …

On a spherically lifted spin model at finite temperature
Xun Tang, Yuehaw Khoo, Lexing Ying
https://arxiv.org/abs/2506.02220 https://…

On a spherically lifted spin model at finite temperature
We investigate an \(n\)-vector model over \(k\) sites with generic pairwise interactions and spherical constraints. The model is a lifting of the Ising model whereby the support of the spin is lifted to a hypersphere. We show that the \(n\)-vector model converges to a limiting distribution at a rate of \(n^{-1/2 + o(1)}\). We show that the limiting distribution for \(n \to \infty\) is determined by the solution of an equality-constrained maximization task over positive definite matrices. We pro…

Andernorts behaucht der Himmel seine Transparenz mit blassen Tagfarben.

#Sonnenstürme verkürzen die Lebensdauer von #Starlink-Satelliten und lassen sie schneller zur Erde zurückkehren.
Durch erhöhte #Atmosphärendichte steigt der Luftwiderstan…

Tracking Reentries of Starlink Satellites During the Rising Phase of Solar Cycle 25
The exponential increase of low-Earth orbit (LEO) satellites in the past 5 years has brought into intense focus the need for reliable monitoring and reentry prediction to safeguard from space collisions and ground debris impacts. However, LEO satellites fly within the upper atmosphere region that exerts significant drag forces to their orbits, reducing their lifetimes, and increasing collision risks during dynamic events, like geomagnetic storms. Such conditions can become more severe during ge…

BREAKING: Donald Trump Just Lifted Sanctions on Russia’s War Banks
https://levremembers.substack.com/p/breaking-donald-trump-just-lifted

Diese Geranie wohnt seit 10 Jahren bei mir. Sommers vor der Haustür, winters im Keller. Happy anniversary.

Von Freitag weg wollte ich eigentlich 4 Tage mit Hund Henri und Zelt durch den Spessart wandern. Nun wird es jedoch jeden Tag regnen. Ich soll also

Der Mutara Sektor ist spätestens seit 2285 einer größeren Öffentlichkeit als Sternentstehungsgebiet bekannt.
#startrek