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Posts by Felix Leditzky πŸ³οΈβ€πŸŒˆπŸ³οΈβ€βš§οΈ

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Separating Geometry from Probability in the Analysis of Generalization The goal of machine learning is to find models that minimize prediction error on data that has not yet been seen. Its operational paradigm assumes access to a dataset $S$ and articulates a scheme for ...

After grumbling for years in our substacks about uses and abuses of probability in machine learning, @beenwrekt.bsky.social and I decided it's finally time to put down some concrete ideas in a manifesto with a DOI. Here it is, give us your best feedback. (1/4)

3 hours ago 31 9 2 1

I was so annoyed about wrong information on the internet that I decided to make a video about how non-trinary neutrinos move and what quantum tunneling is. Andy Weir may be more bestselling than me but I'm more expert lol πŸ§ͺβš›οΈ

Buy my book to learn more! πŸ’™πŸ“š
www.penguinrandomhouse.com/books/746817...

4 days ago 823 240 21 23

I can't tell if this is a setup for a joke or an actual question πŸ˜…

If actual Q: I think it's useful to stand up so that the audience knows who's directing questions and taking care of seminar proceedings.

4 days ago 2 0 1 0

Yes, but on an exam I wouldn't count that as a complete answer πŸ˜…

6 days ago 1 0 0 0
A mathematical statement involving operator inequalities and tensor products.
Statement in LaTeX: 
Let $X,Y$ be operators on a finite-dimensional Hilbert space. If $0\leq X \leq Y$, then $X^{\otimes n} \leq Y^{\otimes n}$ for all $n\in\mathbb{N}$.

A mathematical statement involving operator inequalities and tensor products. Statement in LaTeX: Let $X,Y$ be operators on a finite-dimensional Hilbert space. If $0\leq X \leq Y$, then $X^{\otimes n} \leq Y^{\otimes n}$ for all $n\in\mathbb{N}$.

A little task to get your brain going today: Prove the statement in the picture!

1 week ago 10 3 1 0

⬆️ /5 and ➑️ /6 πŸ˜…

1 week ago 2 0 0 0

Of course, this doesn't excuse the (IMO) harsh and hardly useful review you received... don't be discouraged by it, and don't take it personally!

1 week ago 2 0 1 0

Having a non-expert in the topic (but still someone with reasonable overall scientific experience) deem a paper suitable for this conference can be a good sign, if that decision is made on sound scientific principles. /4

1 week ago 2 0 1 0

One could argue that having non-experts also review a paper is a feature, not a bug: In the end, TQC is supposed to cover all aspects of theoretical quantum information science. /3

1 week ago 2 0 1 0

But even when balancing the PC like that, it still doesn't mean that every paper will receive reviews from three experts in the topic (COIs and custom topic preferences given by PC members may be the reason behind that). /2

1 week ago 2 0 1 0
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I'm sorry you had this bad experience with TQC reviews!

The PC chairs typically try to assemble a program committee whose topics of expertise roughly match the distribution of topics submitted to the conference (with data from previous years). /1

1 week ago 3 0 1 0

That both of these things are true gobsmacked me when I was a student:
* Modules are a special case of abelian groups because every module is just an abelian group with extra structure.
* Modules are a generalization of abelian groups because every abelian group is a Z-module.

1 week ago 19 3 1 1
Unlocking Justice: The Power of Data to Confront Inequity and Create Change

by Chad M. Topaz

Release date: May 19, 2026

#1 New Release in General Elections & Political Process

Unlocking Justice: The Power of Data to Confront Inequity and Create Change by Chad M. Topaz Release date: May 19, 2026 #1 New Release in General Elections & Political Process

I am FLOORED that my bookβ€”out May 19β€”is the #1 new release in general elections and political processes. I want to disseminate its justice-focused message as widely as possible. Can you support the momentum by sharing this post or preordering at www.amazon.com/dp/0691276153 or your fave bookseller?

2 weeks ago 37 17 0 1

Representation theory is the way.

3 weeks ago 15 1 1 1
cover of nates gates volume 2. cover depicts a 4x4 matrix, a 3-torus, a 2 qubit gate, and a weyl chamber

cover of nates gates volume 2. cover depicts a 4x4 matrix, a 3-torus, a 2 qubit gate, and a weyl chamber

a page about the weyl chamber.

a page about the weyl chamber.

U(4) appreciation club

U(4) appreciation club

a new issue of nate's gates is available on my website :)))

nates.place/gates/

3 weeks ago 16 6 2 1

Was this decided by a joint steering committee?

4 weeks ago 1 0 1 0

In recent weeks (if not months?) I've been getting an extraordinary amount of review requests (for journals). I'm wondering if anyone else is experiencing the same thing? Both at my career stage (late tenure-track) and more generally.

1 month ago 3 0 0 0

How is "intelligence" on the y-axis defined?

1 month ago 3 0 0 0
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Creativity is not a talent. It's a process and a practice available to everyone.

1 month ago 896 262 11 0
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Charles Bennett and Gilles Brassard have been named the winners of the A.M. Turing Award, one of the highest honors in computing, for their work establishing the foundations of quantum information theory. The award comes with a $1 million prize. www.quantamagazine.org/quantum-cryp...

1 month ago 57 17 0 1

I'm really proud to have contributed a tiny part to the amazing success of the open-access and not-for-profit journal Quantum, both as an author and as a member of the editorial board.

1 month ago 20 0 0 0
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2026 Quantum papers! Congratulations Quantum community! It’s hard to believe 10 years have passed and we’re en route to our 10-year founding anniversary in April 2026. On that occasion we wanted to announce ...

Celebrate with us Quantum's approaching 10 year anniversary in 2026 with the publication of the 2026th paper! Do you know which paper that is?
quantum-journal.org/2026-quantum...

1 month ago 24 10 0 1
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a white cockatoo with a yellow beak is standing on a brown surface Alt: a sulphur-crested cockatoo, looking very happy, showing its head

It's official! The Theory of #Quantum Computation, Communication and Cryptography conference (TQC) 2028 will be held in Sydney, πŸ‡¦πŸ‡Ί Australia, in August'28!
tqc-conference.org/2026/2027/ #TQC2028

(TQC 2027 will take place in Grenoble, France)

1 month ago 32 12 1 1

Congrats!!

1 month ago 2 0 0 0

It says in the text that "arXiv is establishing itself as an independent nonprofit organization" for "long-term financial sustainability" (among other reasons).

Maybe it became too big to rely on support from institutions and the Simons Foundation?

1 month ago 2 1 0 0
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RIP Tony Leggett It's been an extremely busy time, and there are all kinds of distressing events afoot.Β  Talking about new science results or the funding sit...

πŸ§ͺβš›οΈ Brief thoughts on the passing of Tony Leggett, an outstanding theoretical physicist with a lasting impact across multiple topics. nanoscale.blogspot.com/2026/03/rip-...

1 month ago 36 10 2 2
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www.reddit.com/r/Programmer...

1 month ago 21 6 1 0

Mail them to my home instead πŸ™

1 month ago 1 0 0 0

Just in time for Quantum's 10th anniversary, our paper "Localizing multipartite entanglement with local and global measurements" with students Chris Vairogs and Sam Hermes has been published in Quantum πŸ₯³ Huge congrats to Chris and Sam!

quantum-journal.org/papers/q-202...

1 month ago 8 0 0 0

10 years after its founding, driven by the energy, enthusiasm, & dedication of the community @quantum-journal.bsky.social quietly published paper #2000 some days ago.

At least I think this is a big deal, big shout out to the founders & all authors, reviewers, editors, board members & contributors!

1 month ago 45 10 0 2