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Reposted by Alexander Stottmeister

Joseph Luna @virologistjoe.bsky.social · 8d

I made a sign for the lab with our informal lab motto, inspired by this convo between @itaiyanai.bsky.social and Martin Lercher: nightscience.buzzsprout.com/1744020/epis.... A good reminder that talking is among the best forms of thinking!

A plastic sign with a logogram of two people in conversation alongisde text that reads "There are no lone geniuses"

Our new "There are no lone geniuses" sign mounted on the door to the lab.

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Reposted by Alexander Stottmeister

Amrei Bahr @amreibahr.bsky.social · 16d

Sie ist da: Die 1. Ausgabe meines #ArbeitInDerWiss Newsletters bei Steady, wo der Newsletter ab jetzt 1 neues Zuhause hat! 🤩 & dann auch noch 1 gemeinsamer Text mit @drkeichhorn.bsky.social! 🥰 Es geht um Kürzungen an Hochschulen & warum es nun Solidarität mit Geistes- & Sozialwissenschaften braucht.

Ins eigene Fleisch: Warum Kürzungen an Hochschulen allen schaden

von Amrei Bahr und Kristin Eichhorn

steady.page

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Alexander Stottmeister @stotti-alex.bsky.social · 17d

Indeed :)

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Reposted by Alexander Stottmeister

Henrik Wilming @arrr.de · 17d

Like embezzlement of entanglement but not von Neumann algebras?

Check out
arxiv.org/abs/2509.15749

where we show explicitly that generic Gaussian fermionic states provide universal embezzling families.

Plus: A novel bound relating trace distance of Gaussian states to their covariance matrices.

Gaussian fermionic embezzlement of entanglement

Embezzlement of entanglement allows to extract arbitrary entangled states from a suitable embezzling state using only local operations while perturbing the resource state arbitrarily little. A natural...

arxiv.org

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Reposted by Alexander Stottmeister

Lauritz van Luijk @lvanluijk.bsky.social · 21d

New paper on entanglement in infinite quantum systems with @stotti-alex.bsky.social @arrr.de 🎉:

arxiv.org/abs/2509.12911

The paper investigates bipartitions of quantum systems with infinitely many degrees of freedom. Small thread below 👇

Uniqueness of purifications is equivalent to Haag duality

The uniqueness of purifications of quantum states on a system $A$ up to local unitary transformations on a purifying system $B$ is central to quantum information theory. We show that, if the two syste...

arxiv.org

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Reposted by Alexander Stottmeister

Henrik Wilming @arrr.de · Sep 4

🥳I am very happy to have been awarded an ERC Starting Grant that I will use to start my own group and explore the large-scale entanglement properties of complex quantum systems.

This would not have been possible without my fantastic collaborators and supervisors. A big "thank you" to all of you! 🙏

European Research Council (ERC) @erc.europa.eu · Sep 4

📣 The ERC Starting Grant call results are out!

Find out which early-career researchers will receive funding this year, what they will be investigating, where they will be based... plus lots of other #ERCStG facts & figures for 2025!

➡️ buff.ly/IsafuFh

#FrontierResearch 🇪🇺#EUfunded #HorizonEurope

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Reposted by Alexander Stottmeister

Terence Tao @teorth.bsky.social · Aug 18

I wrote an op-ed on the world-class STEM research ecosystem in the United States, and how this ecosystem is now under attack on multiple fronts by the current administration: newsletter.ofthebrave.org/p/im-an-awar...

I’m an award-winning mathematician. Trump just cut my funding.

The “Mozart of Math” tried to stay out of politics. Then it came for his research.

newsletter.ofthebrave.org

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Terence Tao @teorth.bsky.social · Aug 8

I have some related posts on this at mathstodon.xyz/@tao/1149568... and mathstodon.xyz/deck/@tao/11...

Terence Tao (@[email protected])

The current administration in the US has, through various funding agencies such as the NSF and NIH, has recently suspended virtually all federal grants to my home university, UCLA (including my own p...

mathstodon.xyz

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Reposted by Alexander Stottmeister

Terence Tao @teorth.bsky.social · Aug 8

#IPAM (the institute for pure and applied mathematics) is facing a critical shortfall for operating expenses due to an unexpected suspension of NSF funding www.ipam.ucla.edu/news/nsf-fun... . Donations for emergency continuity of operations funding can be made at

giving.ucla.edu/Campaign/Donat

www.ipam.ucla.edu

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Alexander Stottmeister @stotti-alex.bsky.social · Aug 7

If you find it strange that the inequality involves two arbitrary states, operator-valued weights come to your aid, giving meaning to the inverse of a state. This way, the inequality becomes a statement about the cp-odering of maps from B(H) to the subalgebras associated with systems B and BC.

operator-valued weight version of the operator version of strong subadditivity

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Reposted by Alexander Stottmeister

Henrik Wilming @arrr.de · Aug 7

Small paper w/ @lvanluijk.bsky.social and @stotti-alex.bsky.social: We revisit the amazing operator inequality by Lin et al. (arXiv:2211.13372), which implies strong sub-additivity of entropy and find that it's a special case of Connes' theory of spatial derivatives:

arxiv.org/abs/2508.03731

$An inequality between density operators: \rho_A \otimes \sigma_{BC}^{-1} \geq \rho_{AB} \otimes \sigma_C^{-1}$

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Reposted by Alexander Stottmeister

🪾santiago, phd 🐈‍⬛ @santiagokique.bsky.social · Aug 2

Terence Tao (@teorth.bsky.social) has written a thread on Mastodon about the impact of the federal grant freeze to UCLA, particularly to his own field of Mathematics. UCLA's IPAM (Institute of Pure and Applied Mathematics) could shut down entirely

mathstodon.xyz/@tao/1149568...

Terence Tao (@[email protected])

The current administration in the US has, through various funding agencies such as the NSF and NIH, has recently suspended virtually all federal grants to my home university, UCLA (including my own p...

mathstodon.xyz

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Reposted by Alexander Stottmeister

Dan Garisto @dangaristo.bsky.social · Jul 31

For the math folks on here: NSF has suspended Terry Tao's grant. www.nsf.gov/awardsearch/...

NSF Award Search: Award # 2347850

Structure theory for measure-preserving systems, additive combinatorics, and correlations of multiplicative functions

www.nsf.gov

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Reposted by Alexander Stottmeister

Henrik Wilming @arrr.de · Jul 30

Happy to see that our paper on multipartite embezzlement with @lvanluijk.bsky.social and @stotti-alex.bsky.social is finally out in @quantum-journal.bsky.social

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

Multipartite Embezzlement of Entanglement

Lauritz van Luijk, Alexander Stottmeister, and Henrik Wilming, Quantum 9, 1818 (2025). Embezzlement of entanglement refers to the task of extracting entanglement from an entanglement resource via loca...

quantum-journal.org

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Reposted by Alexander Stottmeister

Alexander Kasprzyk @amkasprzyk.bsky.social · Jul 25

The devastating funding cuts to mathematics research in the US will cut-short the careers of a generation of mathematicians. It really is disgraceful, and unbelievably shortsighted. #MathSky
www.scientificamerican.com/article/can-...

Math Is Quietly in Crisis over NSF Funding Cuts

A 72 percent reduction in federal funding is devastating to math research. The American Mathematical Society is offering $1 million in backstop grants—but it’s likely not enough

www.scientificamerican.com

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Reposted by Alexander Stottmeister

Andreea Lefterovici @andreealefterovici.bsky.social · Jul 21

Henrik will soon talk about entanglement in the thermodynamic limit at LUH :).

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Reposted by Alexander Stottmeister

Andreea Lefterovici @andreealefterovici.bsky.social · Jul 18

Are you a student or early-career researcher in quantum computing or quantum information? Then the following is for you.

We're organising a focused, community-driven conference at Leibniz Universität Hannover, hosted by Prof. Robert Raussendorf.

🗓️ Save the date: August 27–29, 2025

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Reposted by Alexander Stottmeister

Sergey Frolov🇺🇦 @spinespresso.bsky.social · Jul 14

don't despair! there is still quantum...

Manlio De Domenico @manlius.bsky.social · Jul 14

Nobody could have foreseen that!

www.telegraph.co.uk/business/202...

The great AI delusion is falling apart

New research suggests the chorus of techno-optimism is based on falsehoods

www.telegraph.co.uk

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Alexander Stottmeister @stotti-alex.bsky.social · Jul 5

🙏

Reposted by Alexander Stottmeister

Greg Egan @gregegansf.bsky.social · Jul 3

Science writer Amanda Gefter spent more than a decade tracking down the people who knew him, and diving into a vast store of his unpublished work and private papers.

A long read, but fascinating and moving.

Link: nautil.us/finding-pete...

Finding Peter Putnam

The forgotten janitor who discovered the logic of the mind

nautil.us

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Reposted by Alexander Stottmeister

Henrik Wilming @arrr.de · Jun 23

Thanks to @phys.org.web.brid.gy for covering our recent work with @stotti-alex.bsky.social and @lvanluijk.bsky.social on embezzlement of entanglement in critical systems:

phys.org/news/2025-06...

Paper: www.nature.com/articles/s41...

Universal embezzlers naturally emerge in critical fermion systems, study finds

Embezzlement of entanglement is an exotic phenomenon in quantum information science, describing the possibility of extracting entanglement from a resource system without changing its quantum state. In...

phys.org

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Reposted by Alexander Stottmeister

Ulrich Pennig @pennigulrich.bsky.social · Jun 5

Cardiff is hosting the 38th British Topology Meeting from 9th - 11th September 2025. The registration is now open! Come along if you are looking for some interesting talks about all things topological. Details can be found here: sites.google.com/view/btm38 #MathSky #topology #AcademicSky

38th BTM

The meeting will begin on Tuesday 9th September at 13:00 and will close around noon on Thursday 11th September. All talks will be held in Abacws.

sites.google.com

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Alexander Stottmeister @stotti-alex.bsky.social · May 27

For those wondering what embezzlement of entanglement is, I have heard from Henrik (@arrr.de) that the Cambridge Dictionary is preparing an updated version…

Definition of embezzlement of entanglement according to the upcoming edition of the Cambridge Dictionary:

The crime of secretly taking entanglement that is in your care or that belongs to an organization or business you work for.

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Alexander Stottmeister @stotti-alex.bsky.social · May 27

It is interesting to note that our results hold irrespective of the topology of the energy bands w.r.t. quasi-momenta, i.e., also critical points associated with topological phase transitions exhibit universal embezzlement, e.g., in the SSH model.

Alexander Stottmeister @stotti-alex.bsky.social · May 27

By Jordan-Wigner duality, our results imply the same property for various ground state sectors of locally interacting spin chains. Technically, we prove that half-chain observable algebras of said models are type III_1 factors.

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