Lightnews — Scholar-powered news

Korbinian Kottmann @qottmann.bsky.social · 21d

In case you haven't already: there is one more week to fill the @unitary.foundation quantum OSS survey for anyone using or developing qc software

unitary.foundation/posts/2025_q...

The 2025 QOSS Survey is Open! - Unitary Foundation

Unitary Foundation

unitary.foundation

1 4

Korbinian Kottmann @qottmann.bsky.social · Sep 4

It is that time of year again! The @unitary.foundation qOSS survey is here! Please consider filling it out if you are using, developing or maintaining any quantum OSS like @pennylaneai.bsky.social or similar

unitary.foundation/posts/2025_q...

3 6

Reposted by Korbinian Kottmann

Craig Gidney @craiggidney.bsky.social · Aug 1

The first novel thing I did in quantum computing was find a way add +1 to a register using O(1) space and O(n) gates. For 10 years I've wanted to know how to generalize that from x+=1 to x+=C... and I finally figured out a way to do it!

arxiv.org/abs/2507.23079

3 1 26

Reposted by Korbinian Kottmann

Joseph Bowles @josephbowles.bsky.social · Jul 23

New opening in the QML team @ Xanadu!

xanadu.applytojob.com/apply/v1gc8F...

Quantum Machine Learning Researcher (Remote) - Xanadu - Career Page

Apply to Quantum Machine Learning Researcher (Remote) at Xanadu in Toronto, ON, Canada.

xanadu.applytojob.com

2 4

Korbinian Kottmann @qottmann.bsky.social · Jul 1

1

Korbinian Kottmann @qottmann.bsky.social · Jul 1

or you can listen to my ramblings here www.youtube.com/watch?v=rMyC...

2025 QUANTUM PROGRAM ❯ Day 11 ❯ Quantum Simulation and Lie Theory (Dr. Korbinian Kottmann)

YouTube video by WISER

www.youtube.com

1 4

Korbinian Kottmann @qottmann.bsky.social · Jun 26

Being square 🟥 is allright: it will be essentially a condensed version of the following 4 tutorials

[1] pennylane.ai/qml/demos/tu...
[2] pennylane.ai/qml/demos/tu...
[3] pennylane.ai/qml/demos/tu...
[4] pennylane.ai/qml/demos/tu...

Introducing (dynamical) Lie algebras for quantum practitioners | PennyLane Demos

A gentle introduction to Lie theory covering the basics of Lie algebras and Lie groups in the context of quantum computing.

pennylane.ai

1 3

Korbinian Kottmann @qottmann.bsky.social · Jun 26

I'm giving an (online) talk next Monday. Be there or be square 🟥

www.thewiser.org/agenda

1 2 6

Korbinian Kottmann @qottmann.bsky.social · Jun 4

Spotted: A photonic GKP state in the wild 🕵️‍♀️ so cool to see!

www.nature.com/articles/s41...

1 5

Reposted by Korbinian Kottmann

Ross Duncan @rossquantum.bsky.social · Jun 4

Job ad 🧵 2/2
Quantinuum are looking for software engineer to help design and implement quantum programming languages. You need to have OPINIONS about types. Full-time, permanent, based in Cambridge in England.
#jobad #quantum #quantumcomputing #pl #proglang
jobs.eu.lever.co/quantinuum/6...

Quantinuum - Research Software Engineer - Quantum Error Correction

Quantinuum are hiring a research software engineer to work on compilation of fault-tolerant quantum software for the next generation of quantum computers. Quantum software relies on quantum error corr...

jobs.eu.lever.co

1 3 5

Reposted by Korbinian Kottmann

Ross Duncan @rossquantum.bsky.social · Jun 4

Job ad 🧵 1/2
Quantinuum are looking for QEC person to join our compiler team. Ideally you know lots about QEC and a bit about compilers but the other way could work too. Full-time, permanent, based in Cambridge in England.
#jobad #quantum #quantumcomputing #qec
jobs.eu.lever.co/quantinuum/d...

Quantinuum - Research Software Engineer - Quantum Error Correction

Quantinuum are hiring a research software engineer to work on compilation of fault-tolerant quantum software for the next generation of quantum computers. Quantum software relies on quantum error corr...

jobs.eu.lever.co

2 2 8

Korbinian Kottmann @qottmann.bsky.social · Jun 3

Trying to understand fault tolerant architectures without getting into the nitty gritty details of surface code physics:

The Game of Surface Codes 🐉

pennylane.ai/qml/demos/tu...

1 7

Reposted by Korbinian Kottmann

Louis Vignoli @lvignoli.eu · May 23

arxiv.org/abs/2505.15917

1 4 23

Korbinian Kottmann @qottmann.bsky.social · May 12

oh no! feel like this is gonna come haunting a lot of people soon 😅

2

Korbinian Kottmann @qottmann.bsky.social · May 7

Trans-anything flights are no longer covered by the FAA

Korbinian Kottmann @qottmann.bsky.social · Apr 28

we're starting an encyclopedia style database for passes and concepts in quantum compilation pennylane.ai/compilation

what sort of things would people expect and like to see here?

Quantum Compilation — PennyLane

Reduce the size of your circuits to run them on next-generation quantum computing hardware. Find explanations and implementations of key compilation techniques.

pennylane.ai

1

Reposted by Korbinian Kottmann

Craig Gidney @craiggidney.bsky.social · Apr 1

Consider this a warning. Factoring small numbers is a bad benchmark. Because the key to factoring small numbers isn’t making the quantum computer "work well". That’s the key to factoring *large* numbers. For small numbers it's sufficient to generate a far-too-large circuit, and light the fuse.

5 42

Korbinian Kottmann @qottmann.bsky.social · Mar 28

firefox has this, also possibility to select multiple tabs via shift or cmd and then close with cmd+W :)

2

Reposted by Korbinian Kottmann

Daniel González @danielgc25.bsky.social · Mar 27

I am very happy to announce that I will soon join @iftuamcsic.bsky.social as a Ramon y Cajal Fellow ‼️

I am also offering a PhD position on "Quantum Algorithms for High-Energy Physics" ⚛️ Deadline is April 30 and the details can be found here: www.gonzalez-cuadra.com/open-positions

Please share!

González-Cuadra Group @ IFT - Open positions

PhD position in Quantum Algorithms for High-Energy Physics (currently open)

www.gonzalez-cuadra.com

7 20

Korbinian Kottmann @qottmann.bsky.social · Mar 15

With people saying their results got debunked even though neither paper actually does or, for that matter, even claims that they debunk their results, I can partly understand not wanting to discuss the paper with said people in the first place.

1 1

Korbinian Kottmann @qottmann.bsky.social · Mar 15

Beautiful! Did not know that and definitely would have needed that before! F(ρ,σ) = tr(√(ρσ)) is so much nicer! Is there a good reason to still refer to fidelity/matrix inner products using tr[√(√(ρ)σ√(ρ))]?

1 1

Korbinian Kottmann @qottmann.bsky.social · Mar 14

contrary to its headline, the article makes a pretty good case for dwave imo

2 2

Korbinian Kottmann @qottmann.bsky.social · Mar 13

Yeah I was actually wondering if "spoofing" is the right english word. I think I meant "debunk", or "disprove" (in an unscientific / loose way)

Korbinian Kottmann @qottmann.bsky.social · Mar 13

When you just read the paper, indeed, but that's not what I'm getting from the last author's comments in www.newscientist.com/article/2471...

Doubts cast over D-Wave's claim of quantum computer supremacy

D-Wave's claim that its quantum computers can solve problems that would take hundreds of years on classical machines have been undermined by two separate research groups showing that even an ordinary ...

www.newscientist.com

1

Korbinian Kottmann @qottmann.bsky.social · Mar 13

Ansonsten sehr guter und differenzierter Artikel, damit hätt ich anfangen sollen, sorry!

1 1