Korbinian Kottmann
@qottmann.bsky.social
Quantum compilation & open source software.
working on pennylane.ai
https://github.com/qottmann
free hot takes
working on pennylane.ai
https://github.com/qottmann
free hot takes
I heard someone say reverting daylight saving time in October is like "trading one hour of sleep (once) for five months of darkness" and now I cant unhear it.
November 12, 2025 at 4:29 PM
I heard someone say reverting daylight saving time in October is like "trading one hour of sleep (once) for five months of darkness" and now I cant unhear it.
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...
unitary.foundation/posts/2025_q...
The 2025 QOSS Survey is Open! - Unitary Foundation
Unitary Foundation
unitary.foundation
September 25, 2025 at 6:09 PM
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...
unitary.foundation/posts/2025_q...
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...
unitary.foundation/posts/2025_q...
September 4, 2025 at 8:22 AM
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...
unitary.foundation/posts/2025_q...
Reposted by Korbinian Kottmann
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
arxiv.org/abs/2507.23079
August 1, 2025 at 3:03 AM
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
arxiv.org/abs/2507.23079
Reposted by Korbinian Kottmann
June 26, 2025 at 12:12 PM
June 4, 2025 at 3:46 PM
Reposted by Korbinian Kottmann
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 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
June 4, 2025 at 6:52 AM
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 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...
Reposted by Korbinian Kottmann
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 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
June 4, 2025 at 6:46 AM
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 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...
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...
The Game of Surface Codes 🐉
pennylane.ai/qml/demos/tu...
June 3, 2025 at 1:46 PM
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...
The Game of Surface Codes 🐉
pennylane.ai/qml/demos/tu...
Reposted by Korbinian Kottmann
May 23, 2025 at 8:27 AM
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?
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
April 28, 2025 at 10:09 AM
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?
what sort of things would people expect and like to see here?
Reposted by Korbinian Kottmann
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.
April 1, 2025 at 10:33 PM
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.
Reposted by Korbinian Kottmann
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!
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
March 27, 2025 at 6:58 PM
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!
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!
What I gather from the most recent DWAVE saga. TLDR: I don't think the spoofers have a done a very good or convincing job here 🤷
March 13, 2025 at 3:25 PM
What I gather from the most recent DWAVE saga. TLDR: I don't think the spoofers have a done a very good or convincing job here 🤷
Reposted by Korbinian Kottmann
For a little bit of light in these trying times, I present to you: quantum memes!
These are made by my Physics 438a class for extra credit on their midterm (which they are taking at this moment). As always, I take all credit for good memes and no blame for bad ones.
These are made by my Physics 438a class for extra credit on their midterm (which they are taking at this moment). As always, I take all credit for good memes and no blame for bad ones.
February 13, 2025 at 6:22 PM
For a little bit of light in these trying times, I present to you: quantum memes!
These are made by my Physics 438a class for extra credit on their midterm (which they are taking at this moment). As always, I take all credit for good memes and no blame for bad ones.
These are made by my Physics 438a class for extra credit on their midterm (which they are taking at this moment). As always, I take all credit for good memes and no blame for bad ones.
Any high level but technical explanations of DeepSeek that doesnt talk about nvidia stock out there?
How did they build something seemingly competitive / superior with much fewer means?
How did they build something seemingly competitive / superior with much fewer means?
January 27, 2025 at 5:16 PM
Any high level but technical explanations of DeepSeek that doesnt talk about nvidia stock out there?
How did they build something seemingly competitive / superior with much fewer means?
How did they build something seemingly competitive / superior with much fewer means?
Reposted by Korbinian Kottmann
Looking for a talented postdoc to join my group (the Computational Quantum Science Lab) at EPFL, in Lausanne 🇨🇭
Research Topics Include: Neural Quantum States, Many-Body Systems, Ab-Initio & Quantum Chemistry...etc
Start: Fall 2025, excellent conditions
Apply: www.epfl.ch/labs/cqsl/jo...
Research Topics Include: Neural Quantum States, Many-Body Systems, Ab-Initio & Quantum Chemistry...etc
Start: Fall 2025, excellent conditions
Apply: www.epfl.ch/labs/cqsl/jo...
Job Opportunities at CQSL
At the Computational Quantum Science Lab we typically have several openings yearly (at the PhD/ Postdoc level). Applications are reviewed twice a year, at the beginning of April and at the beginning o...
www.epfl.ch
January 27, 2025 at 12:03 PM
Looking for a talented postdoc to join my group (the Computational Quantum Science Lab) at EPFL, in Lausanne 🇨🇭
Research Topics Include: Neural Quantum States, Many-Body Systems, Ab-Initio & Quantum Chemistry...etc
Start: Fall 2025, excellent conditions
Apply: www.epfl.ch/labs/cqsl/jo...
Research Topics Include: Neural Quantum States, Many-Body Systems, Ab-Initio & Quantum Chemistry...etc
Start: Fall 2025, excellent conditions
Apply: www.epfl.ch/labs/cqsl/jo...
high praise
Not bullshit
World’s first scalable, networked photonic quantum computer prototype unveiled
Aurora, a new photonic quantum computer from Xanadu, overcomes qubit limitations with light-based technology.
interestingengineering.com/innovation/w...
Aurora, a new photonic quantum computer from Xanadu, overcomes qubit limitations with light-based technology.
interestingengineering.com/innovation/w...
January 27, 2025 at 2:52 PM
high praise
when you accidentally drink non-decaf coffee and your brain is yelling every thought aaaaaaaaaa
January 24, 2025 at 11:17 AM
when you accidentally drink non-decaf coffee and your brain is yelling every thought aaaaaaaaaa
Reposted by Korbinian Kottmann
We recently released a software package to optimize IQP circuits that scales to millions of qubits and gates. Our main motivation was quantum machine learning (paper on the way!), but we believe there could be many other applications.
arxiv.org/abs/2501.04776
github.com/XanaduAI/iqp...
arxiv.org/abs/2501.04776
github.com/XanaduAI/iqp...
IQPopt: Fast optimization of instantaneous quantum polynomial circuits in JAX
IQPopt is a software package designed to optimize large-scale instantaneous quantum polynomial circuits on classical hardware. By exploiting an efficient classical simulation algorithm for expectation...
arxiv.org
January 20, 2025 at 9:45 AM
We recently released a software package to optimize IQP circuits that scales to millions of qubits and gates. Our main motivation was quantum machine learning (paper on the way!), but we believe there could be many other applications.
arxiv.org/abs/2501.04776
github.com/XanaduAI/iqp...
arxiv.org/abs/2501.04776
github.com/XanaduAI/iqp...
Do you remember the feeling when you finally fully grasped SVD and realized your linear algebra powers have no limits now? You can re-live that moment by learning about the KAK decomposition for the unitary group!
pennylane.ai/qml/demos/tu...
awesome summary by @dwierichs.bsky.social
pennylane.ai/qml/demos/tu...
awesome summary by @dwierichs.bsky.social
The KAK decomposition | PennyLane Demos
Learn about the KAK decomposition and how it powers circuit decompositions.
pennylane.ai
January 16, 2025 at 1:40 PM
Do you remember the feeling when you finally fully grasped SVD and realized your linear algebra powers have no limits now? You can re-live that moment by learning about the KAK decomposition for the unitary group!
pennylane.ai/qml/demos/tu...
awesome summary by @dwierichs.bsky.social
pennylane.ai/qml/demos/tu...
awesome summary by @dwierichs.bsky.social
Happy np.sum(np.arange(10)**3) erveryone!
January 2, 2025 at 12:17 PM
Happy np.sum(np.arange(10)**3) erveryone!
Seeing our software and resources be used by other researchers and practitioners in the qc space gives me extreme "academic pride", for a lack of better words 🥲
Here's to more well-documented code in 2025
Here's to more well-documented code in 2025
December 20, 2024 at 2:13 PM
Seeing our software and resources be used by other researchers and practitioners in the qc space gives me extreme "academic pride", for a lack of better words 🥲
Here's to more well-documented code in 2025
Here's to more well-documented code in 2025
I can do a computation on my smartphone in a few seconds that would take the Antikythera mechanism longer than the age of the universe. Therefore we must live in a multiverse □
(or at least my smartphone lives in one)
(or at least my smartphone lives in one)
Nobody:
Marc Andreessen: Willow proves that we live in a multiverse
(Original post by @QuantumMemeing)
x.com/QuantumMemei...
Marc Andreessen: Willow proves that we live in a multiverse
(Original post by @QuantumMemeing)
x.com/QuantumMemei...
December 16, 2024 at 12:00 PM
I can do a computation on my smartphone in a few seconds that would take the Antikythera mechanism longer than the age of the universe. Therefore we must live in a multiverse □
(or at least my smartphone lives in one)
(or at least my smartphone lives in one)