Felix Leditzky 🏳️‍🌈🏳️‍⚧️

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 🥳 Huge congrats to Chris and Sam!

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

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!

Was TCing Gabriel a mistake... Maybe.
Could it have been worse... Definitely!

P.S.: As a Gunner, I'm just really mad about today's game.

I think large parts of this sentiment apply to STEM as well.

It’s going to sound quaint, but the best way to resist an AI takeover of the humanities is to assign physical books, sit around, read them, and argue about ideas. Academic has become such a competitive arena, that we ourselves are trained to look for the winning angle, instead of the best education.

2026 Fellows | Alfred P. Sloan Foundation Our mission is to make the world a better place through the advancement of scientific knowledge.

QIS Sloan Fellowships for Anand Natarajan, John Wright, Jake Covey (UIUC) and Isaac Kim, and a non-QIS Sloan for fellow UIUC math member Ben Castle. Congrats!!

sloan.org/fellowships/...

Always made me wonder. I guess the geometric nature of GR and the nice pictures people use to explain it have more appeal than a bunch of psi's 🤣

I remember my student times when these crackpots (always older men) would sit through a lecture, to then start yelling how Einstein was wrong, relativity is bullshit, and holding up their handwritten signs and sheets of paper. It was always about gravity, and never about quantum mechanics.

four stick figures on sleds, one is sliding face first, face down, marked "skeleton", diagonally opposite to it is one sliding feet first, face up, marked "luge". The other two combinations are drawn and labeled with question marks

given the existence of skeleton and luge, i postulate the existence of two other, yet to be discovered, winter olympic sports

I had a mini disc player (stereo at home and portable)

New many-body postdoc offering at @UMDscience; come join us! umd.wd1.myworkdayjobs.com/UMCP/job/Uni...

A scrawled bit of barely legible cursive handwriting that reads "But I am very poorly today & very stupid & hate everybody & everything."

"But I am very poorly today & very stupid & hate everybody & everything. One lives only to make blunders."

Charles Darwin, who had a pretty bad day every now and then, was born #OTD in 1809. 🧪

The letter to Charles Lyell with the quote above:
www.darwinproject.ac.uk/letter?docId...

Many thanks to Theshani and Sujeet for seeing this through! I've learned a lot in the process 🤓

Finally, we also consider a private variant of the classical shadows technique to estimate expectation values, identifying settings where this approach gives good protocols.

We then focus on a specific application: estimating the expectation value of an observable w.r.t. a quantum state when only given access to the privatized quantum state. We characterize the sample complexity of this task, for the lower bound by employing private quantum hypothesis testing bounds.

We study privacy-utility tradeoffs in a quantum differential privacy setting.

We first discuss a generic setting and show how depolarizing noise achieves the optimal utility w.r.t. trace distance and fidelity.

New paper "Privacy-Utility Tradeoffs in Quantum Information Processing" with my postdoc Theshani Nuradha and my student Sujeet Bhalerao!

scirate.com/arxiv/2602.1...

Approximate Unitary $k$-Designs from Shallow, Low-Communication Circuits Random unitaries are useful in quantum information and related fields, but hard to generate with limited resources. An approximate unitary $k$-design is an ensemble of unitaries with an underlying mea...

It's worth reading the new version (either on CMP or the arXiv at arxiv.org/abs/2407.07876), since we're giving a streamlined and much more readable proof of our main result!

Approximate Unitary k-Designs from Shallow, Low-Communication Circuits - Communications in Mathematical Physics Random unitaries are useful in quantum information and related fields, but hard to generate with limited resources. An approximate unitary k-design is an ensemble of unitaries with an underlying measu...

Our paper on approximate unitary designs in logarithmic depth with Nick LaRacuente is now published in Communications in Mathematical Physics!

link.springer.com/article/10.1...

My TQC submission.

I bury my head in the sand when I see some of these maps

Yes! hopefully this is the start of a good stretch of competitive seasons

Unbelievable

Whaaaaat. OT here we come. This is so stressful

Handshake meme with Chicago and St Louis bonding over both being against the Rams today.

#GoBears 🐻

Open Positions PhD positions Coming soon (Australian student only)- Topic: Blueprint quantum processor with nuclear spin logical qubits in silicon. Postdoc positions Postdoctoral Research Fellow – Rottnest:…

Several postdoc positions to work on quantum computing with Simon Devitt, at UTS: quantumts.org/open-positio...

The real reason why you need to submit your slides before the start of #QIP2026 is so that during the conference you have time to work on your #TQC2026 submission.

Agree with the advantages! But when this is announced a week before the desired cut-off date, and the latter also coincides with the first day of instruction, it creates some logistical problems 🙃

I'll do my best, but honestly... well let's see

Asking researchers to submit their presentation slides by Wednesday of the week _before_ the conference starts is a tall order 😅 good luck! #qip2026