Volker K.

The Quick and Shameful Death of Biden’s Biggest Policy It was far too easy for Republicans to kill the Inflation Reduction Act. Where did those who crafted it go wrong?

"The IRA’s survival was premised on the logic that a loose alignment of corporations would support climate policies in exchange for subsidies and convince Republicans to get on their side. That didn’t work"

Top @katearonoff.bsky.social piece in @newrepublic.com -->>>

Is it in Paris?

Today in

As the World Burns

A reversal of Antarctic ice formation.

Quantum state tomography for states that vary with parameters such as time or control settings attains new capabilities in characterization of evolving quantum states.

go.aps.org/3SAelEa

"XYZ ruby code: Making a case for a three-colored graphical calculus for quantum error correction in spacetime"

journals.aps.org/prxquantum/a...

This work presents a new highly attractive #Floquetcode in #quantumerrorcorrection and introduces - yet another - useful graphical calculus.

What I can say already is that your talks have nice titles!

Thank you! 🙂

@dulwichquantum.bsky.social please add me :)

Taken from this fantastic presentation www.slideshare.net/slideshow/th... by @zacklabe.com

Fantastic presentation. I wish you all the best for your future, and hopefully you can continue with your important work soon... Maybe come to Europe?

The Arctic through the lens of data visualization The Arctic through the lens of data visualization - Download as a PDF or view online for free

I'd like to share another science presentation, which I gave to a class visiting GFDL almost exactly 24 hours before being fired in the NOAA mass layoffs.

Unfortunately, the animations do not work in this format though: www.slideshare.net/slideshow/th.... This one has more of an Arctic focus.

🔬 Object placement is a fundamental skill in chemistry labs—whether it's hanging a beaker on a rack 🧪 or inserting a vial with precision 🎯. But how can we enable robots to place different objects robustly and generalize across diverse tasks? [1/5]

Headline "US democracy has died"

The neoliberal dream of fossil fuel billionaire Charles Koch was always the destruction of US democracy and the elimination of government (except for its repressive organs police, courts, prisons, military ofc), and now he has won.
What now? A 🧵.
1/
t.co/FKxxmLyfce

Ukraine is Europe!
We stand by Ukraine.

We will step up our support to Ukraine so that they can continue to fight back the agressor.

Today, it became clear that the free world needs a new leader. It’s up to us, Europeans, to take this challenge.

I grew up watching the NOAA fleet come in and out of port. What a wonder they are: big radar balls and antennae up top, cranes and winches on the back for instruments and submersibles. They inspired and gave me such pride in country and science.

Solidarity and love for all my NOAA friends today. 💙

I think it would be a good time to reinstantiate the mirror network for the # arXiv. It’s an essential piece of the global research community in math, physics, computer-science and adjacent fields. Under the current circumstances it should not only be hosted in the US.

#quantum #math #physics #cs

We are calling for a nationwide and international boycott of all Elon Musk-related products and services. Sell your Tesla shares, avoid buying Tesla vehicles, cancel Starlink, and delete your X accounts.

YouTube video by Johanna Pirker Rami Ismail – From Modding to Indie Dev Icon, Nuclear Throne, PressKit & The Future of Indie Games

aaaaaaand the podcast with @ramiismail.com is online!!

..maybe it escalated a bit... (2 hours!!!!)

Hope you enjoy it.. super inspiring & interesting

youtu.be/qPFTzP2E-AE

#gamedev #indiedev

Computational Chemistry and Materials Science Minisymposium: Call For Proposals If you’re using Julia in chemistry or materials science (at all , whether or not it specifically uses JuliaMolSim ecosystem tools!), we encourage you to submit a proposal to the Computational Chemistr...

If you’re using Julia in chemistry or materials science, we encourage you to submit a proposal to the Computational Chemistry and Materials Science Minisymposium at JuliaCon 2025 in Pittsburgh, PA, from July 21–26. @julialang.org @juliacon.bsky.social

discourse.julialang.org/t/computatio...

Figure comparing automatic differentiation (AD) and automatic sparse differentiation (ASD). (a) Given a function f, AD backends return a function computing vector-Jacobian products (VJPs). (b) Standard AD computes Jacobians row-by-row by evaluating VJPs with all standard basis vectors. (c) ASD reduces the number of VJP evaluations by first detecting a sparsity pattern of non-zero values, coloring orthogonal rows in the pattern and simultaneously evaluating VJPs of orthogonal rows. The concepts shown in this figure directly translate to forward-mode, which computes Jacobians column-by-column instead of row-by-row.

You think Jacobian and Hessian matrices are prohibitively expensive to compute on your problem? Our latest preprint with @gdalle.bsky.social might change your mind!
arxiv.org/abs/2501.17737
🧵1/8

BlueSky has a chance, if we can keep the bots off the platform. That won't be easy.

I recently spoke at Ethereum Devcon about PopVax (@popvax.com)'s work developing novel mRNA vaccines to save 1 million lives each year, as part of a series of talks organized by Vitalik Buterin (@vitalik.ca) around his d/acc vision – defensive, differential, and decentralized accelerationism. (1/4)

The risk of politician coins comes from the fact that they are such a perfect bribery vehicle. If a politician issues a coin, you do not even need to send *them* any coins to give them money. Instead, you just buy and hold the coin, and this increases the value of their holdings passively. Furthermore, there is deniability: holding the coin is, in terms of financial effect, a linear combination of donating to the issuer and gambling. Hence you can have the intention of doing the former but when challenged claim that you are doing the latter. You can even hold the coin privately, and show that you are holding it to whoever you need to show; you do not need any zero knowledge proofs, you just send a test transaction. This is all risky to democracy, for reasons very similar to what I wrote in https://vitalik.eth.limo/general/2021/08/16/voting3.html , https://vitalik.eth.limo/general/2020/09/11/coordination.html and elsewhere. TLDR: the economic arguments for why markets are so great for "regular" goods and services do not extend to "markets for political influence". I recommend politicians do not go down this path.

On the risks of politician coins:

Perhaps obvious, but what gives ammo to the anti-sciebtists among other things is our own failure to fix the systemic issues within the science organization, proliferation of unreliable results and flawed incentives, lazy editors unscrupulous institutions and all

A little quantum discussion to start off the year.

I was recently asked what is so revolutionary about Google's Willow chip. In short my answer was "nothing really, it's more of an impressive but expected evolution than a revolution.".

Now I'm curious, do people in the community agree?

1/n Some time ago my colleague, excellent cook, and friend Ivan told me: "Cacio e pepe is the recipe that I screw up more often. Let's make a project studying systematically the physics of that sauce".

Prepare to get cheesy, I'm glad to share the Cacio e paper preprint:

arxiv.org/abs/2501.00536

Happy International Year of Quantum Science & Technology! #IYQ2025

GitHub - cadojo/DocumenterQuarto.jl: Build documentation for your Julia package with Quarto! Build documentation for your Julia package with Quarto! - cadojo/DocumenterQuarto.jl

I'm a huge fan of #Quarto, a (relatively) new technical publishing system. I've written a #julialang package, `DocumenterQuarto`, which automatically generates a Quarto project (e.g. website) with any Julia package's documentation!