Tootfinder

I wonder if I ever shared #photos from my #FrozenMajesties Collection - or at least it is a while since I last shared them.
Anyways, I took it during a winter hike in the #Karwendel and r…

I’m so proud of my little brother.
I just spoke to him in his dorm room at a top 30 college here in the US, he just arrived for freshman orientation.
He got in on a full ride - tuition, housing, food, books, travel, stipend for daily expenses. Won a competitive scholarship to do so.
More than that, he’s had a tougher road than most to get there:
- he had to suddenly move away from Manila, Philippines (where he grew up) in middle school because of COVID restrictions that didn’t let kids go outside (2020)
- then, just as he adjusted to school and a different language in our home country, Ukraine, Russia invaded (2022)
- he stayed in Greece for a month while I was calling our congressional representative here in NY and negotiating with the US embassy to get them a visa ASAP to enter the US and be with me and my husband. There were no paths for Ukrainian refugees yet, we just wanted them with us temporarily for a few months to figure out what options they even had next.
- he had to wait, not going to school, with no clue where they’d move next, until TPS became available to Ukrainians and they got to stay here in the US
- then he had to continue high school in yet another system, yet another country, amidst news of bombings and destruction back home
- my mother wasn’t allowed to work for months while their documents were pending, so we had to raise money with a public GoFundMe campaign and my husband and I maxed out our credit cards to help them get by
- they shared a one-room cottage for the first year, graciously hosted for free by an elderly local couple
- he saw a therapist who also graciously took him in for free while they didn’t have insurance
- he had to graduate high school amidst news of other immigrant students getting arrested, detained, and deported at their own graduations around the country
- he wasn’t sure if he would even make it to college as this administration publicly considered canceling TPS for Ukrainians and cutting off their pathway to maintaining legal status.
We don’t know what tomorrow holds. But he’s there. He’s on campus. He got to go to college.
I love him so much.

In March, we wrote about how Trump's halting of a massive Agent Orange cleanup in Vietnam puts hundreds of thousands at risk.
In May, we obtained exclusive records showing how cuts to humanitarian aid have led to violence and instability in Africa and the Middle East while undermining anti-terrorism initiatives
This week, Secretary Marco Rubio began laying off hundreds of State Department officials, including much of the foreign and civil service.
We're continuing …

Exact renormalisation for patch frequencies in inflation systems
Jan Maz\'a\v{c}
https://arxiv.org/abs/2507.07753 https://arxiv.o…

Exact renormalisation for patch frequencies in inflation systems
This note provides an explicit way of calculating the patch frequencies in geometric realisations of primitive substitutions using exact renormalisation relations. Further, we profit from these results to obtain the patch frequencies in the symbolic case as well as in other suspensions (under mild assumptions on the substitution). We illustrate this procedure on the Fibonacci example.

Frequency drift corrected ultra-stable laser through phase-coherent fiber producing a quantum channel
Stanley Johnson, Sandeep Mishra, Anirban Pathak, Subhadeep De
https://arxiv.org/abs/2509.08419

Frequency drift corrected ultra-stable laser through phase-coherent fiber producing a quantum channel
Phase coherent fibers (PCF) are essential to distribute nearly monochromatic photons, ultra-stable in their frequency and phases, which have demanding requirements for state-of-the-art networked experiments, quantum as well as very high-speed communications. We report the development of a novel system that produces PCF links, also actively corrects the unavoidable slow frequency drift of the source laser. The PCF follows white phase noise limited $σ_o \times τ^{-1}$ stability behavior having …

Spin-qubit Noise Spectroscopy of Magnetic Berezinskii-Kosterlitz-Thouless Physics
Mark Potts, Shu Zhang
https://arxiv.org/abs/2509.10309 https://arxiv.org/…

Spin-qubit Noise Spectroscopy of Magnetic Berezinskii-Kosterlitz-Thouless Physics
We propose using spin-qubit noise magnetometry to probe dynamical signatures of magnetic Berezinskii-Kosterlitz-Thouless (BKT) physics. For a nitrogen-vacancy (NV) center coupled to two-dimensional XY magnets, we predict distinctive features in the magnetic noise spectral density in the sub-MHz to GHz frequency range. In the quasi-long-range ordered phase, the spectrum exhibits a temperature-dependent power law characteristic of algebraic spin correlations. Above the transition, the noise refle…

Tunable magnon emission from a nano-optomagnet
Anna Duvakina, Vage Karakhanyan, Mingran Xu, Miguel-Angel Suarez, Axel J. M. Deenen, Marina Raschetti, Andrea Mucchietto, Thierry Grosjean, Dirk Grundler
https://arxiv.org/abs/2507.10742

Tunable magnon emission from a nano-optomagnet
The growing demand for dense, energy-efficient, and high-frequency signal processing continues to drive device miniaturization. While downscaling remains a central challenge, magnons offer a promising solution as nanoscale signal carriers, supporting broadband operation from GHz to THz without moving charge carriers and generating Joule heating. However, their integration at the nanoscale is limited by conventional electrical excitation based on coplanar waveguides, which require metal pads few…

«Wind is largely a European creation»
Someone got a little carried away.
https://www.bloomberg.com/news/articles/2025-07-07/vestas-ceo-says-eu-s-fragmented-policy-puts-wind-energy-at-risk (

Build it and they will come.
In spring 2024, 11% of trips in Paris were made by bicycle and 4.2% by car. In 2010, the cycling share was just 3%.
This year, records have been broken on a monthly basis at many cycle counters. Existing cycle paths are becoming congested and need to be widened.
From: @…

Prospects and Limitations of PTAs Anisotropy Searches -- The Frequentist Case
Thomas Konstandin, Anna-Malin Lemke, Andrea Mitridate, Enrico Perboni
https://arxiv.org/abs/2509.07074

Prospects and Limitations of PTAs Anisotropy Searches -- The Frequentist Case
Recent findings from several Pulsar Timing Array (PTA) collaborations point to the existence of a Gravitational Wave Background (GWB) at nanohertz frequencies. A key next step towards characterizing this signal and identifying its origin is to map the sky distribution of its power. Several strategies have been proposed to reconstruct this distribution using PTA data. In this work, we compare these different strategies to determine which one is best suited to detect GWB anisotropies of different…