Guen Prawiroatmodjo @guenp@physics.social

Here is how I set up my single-user self-hosted Mastodon instance. It was easy if you're a bit familiar with Linux and domain names. No need to be an expert.

Thread with the steps I used follows..

#mastodon #selfhosting #yunohost

Today's gorgeous image from accidental renaissance.

#photography #renaissance #painting #art #accidentalrenaissance

I am not the original photographer. Originally posted here: https://www.reddit.com/r/AccidentalRenaissance/comments/z2qo7r/the_peaks_of_italy/

A big paper on twists in fermionic surface codes.

These codes are like the standard qubit surface codes, but built out of Majorana modes rather than qubits.

Twists are essentially lattice defects in a code, which open up new ways to store and manipulate qubits.

Put them together, and it seems you get a broader range of twists than in surface codes, and more efficient storage of logical information.

https://arxiv.org/abs/2211.11777
#qec #quantum

We now at least have a full slate of candidates for the #Python steering council! Now we just have to wait and see if how many more people get nominated before the 28th.

https://discuss.python.org/c/core-dev/steering-council-nominations/21

Incredibly rare photo of Schrödinger's cat.

I always follow back, and really appreciate and follow boosters

#Cat #Joke #schrodinger

Maths at internet speed. On 16 Nov, Justin Gilmer https://arxiv.org/abs/2211.09055 makes a breakthrough on the #unionClosedSets conjecture, achieving a lower bound of 0.01 instead of the conjectured 0.5. The next day, Gil Kalai blogs about it at https://gilkalai.wordpress.com/2022/11/17/amazing-justin-gilmer-gave-a-constant-lower-bound-for-the-union-closed-sets-conjecture/ . Four days after that, three independent groups optimize the argument to \(\frac{3-\sqrt{5}}{2} \approx 0.38\): https://arxiv.org/abs/2211.11504 https://arxiv.org/abs/2211.11689 https://arxiv.org/abs/2211.11731 . (Via Rachel Greenfeld)

How it started How it's going

New paper on #arXiv!

Imagine you're given a box that's supposed to produce some unknown qubit state \(|\psi\rangle\). While it mostly works, it occasionally fails and outputs the orthogonal state \(|\psi^\perp\rangle\). How can you combine several outputs of such a box to obtain one reliable copy of \(|\psi\rangle\)?

We call this problem "#quantum majority vote" since the goal is to find the majority state from a list of unknown quantum states.

https://arxiv.org/abs/2211.11729

Finished #Sandman on #Netflix last night. Great central performance by #TomSturridge . Probably the most faithful comics adaptation I''ve ever seen, with most episodes precisely matching a comics issue by @neilhimself and his various artists. I wonder what other comics series could support such a faithful issue-by-issue adaptation? (Side-by-side comparison images from https://screenrant.com/the-sandman-netflix-scenes-identically-match-comic-panels/ )

From tonight. There were clouds. The stone was carved by people about 6000 years ago, and then carved again and placed there by people a hundred years ago.

I've been photographing the night sky with my Pixel 6 Pro trying to find an eerie space where the ground and the sky meet...
Here are a few from last night.

Life's short and I used #python and #matplotlib to show it.

https://github.com/basnijholt/calendar-of-life

Cooler animated version: http://files.nijho.lt/calendar-of-life-animated.png

New on this instance of Mastodon and a retired physicist happy to join this community!

A wonderful performance of Canto Ostinato, a superb 1976 work by Dutch composer Simeon ten Holt: https://vimeo.com/31357966

Learned about it via @guenp

From Wikipedia:

"The most remarkable aspect about this work is the amount of freedom that is given to the performer(s). The piece can be performed with different instruments and a different number of performers."

It's composed of 106 sections which can be repeated as wished: "Performance may take from some two hours to more than a day."

🤘 🎶

Realised I never got round to writing an #introduction.

Hi, I'm Cas! I'm a PhD student working on Topological Solitons, currently vortices in Yang-Mills-Higgs theory.

In my spare time I enjoy watching films and anime, walking, and reading.

Actually this paper isn't about QEC. But it reminds me of the repetition code in some ways, which is what caught my eye.

https://arxiv.org/abs/2211.11729

There's a thread on it by @MarisOzols here
https://mastodon.online/@MarisOzols@mathstodon.xyz/109386508264751463
(though if you are on the app, you'd probably be better off clicking the handle rather than the link).

#qec #quantum

*PRO NERD TIP*

Today I learned about "The Wikipedia Library Card". If you've been a WP editor for >6 months, have made >500 edits, at least 10 edits in the last month, and are not blocked for being a jerk, you can access a *ton* of paywalled content for free.

ScienceDirect, AAAS, The BMJ, both APAs, EBSCO, Springer, Nature, Wiley, and many more.

https://wikipedialibrary.wmflabs.org/about/

All those hours in 2005 spent editing sci-fi book articles finally paying off!

🚨 BIG EXOPLANET NEWS! 🚨

Our team has released FIVE papers today on the most COMPREHENSIVE study of an #exoplanet atmosphere to date!

Using #JWST we obtained four transit observations of #WASP39b early in the telescope's operations to study both the planet itself, and the telescope's capabilities to observe exoplanet atmospheres.

We detected numerous molecules in the planet's atmosphere, including CO2, CO, H2O, and SO2 🧵

The future is here! ⭐ 🪐 🔭 #Astrodon #Science

https://webbtelescope.org/contents/news-releases/2022/news-2022-060