Théo Lisart-Liebermann
@theolisart.bsky.social
Quantum researcher @fraunhofer, hacker, popular education fan.
Pinned
Preconditioning Natural and Second Order Gradient Descent in Quantum Optimization: A Performance Benchmark
The optimization of parametric quantum circuits is technically hindered by three major obstacles: the non-convex nature of the objective function, noisy gradient evaluations, and the presence of barre...
www.arxiv.org
This is our first paper in a series of two, which tackles the question of trainability of shallow QAOA algorithms. We provide benchmarks for quasi-newton and natural gradient methods, in addition to introducing a simple secant-penalization in BFGS updates [1/2]
www.arxiv.org/abs/2504.16518
www.arxiv.org/abs/2504.16518
Today I learned that the measurement problem had a satisfactory interpretation since 2002 within quantum statistical mechanics and WHY THE HELL NOBODY TOLD ME EVER
May 21, 2025 at 3:57 PM
Today I learned that the measurement problem had a satisfactory interpretation since 2002 within quantum statistical mechanics and WHY THE HELL NOBODY TOLD ME EVER
This reads like a movie script, props to Vincent for sticking to his guns despite the hierarchy.
Further unreliable research from @qutech.bsky.social and @msftresearch.bsky.social covered by @averyorrall.bsky.social from @retractionwatch.com. I shared details which I wanted to share within a confidential investigation of @tudelft.nl but it was shut down...
www.science.org/content/arti... 1/n
www.science.org/content/arti... 1/n
‘Data manipulations’ alleged in study that paved the way for Microsoft’s quantum chip
Internal emails from 2021 reveal tensions among researchers hunting for elusive Majorana particle
www.science.org
May 9, 2025 at 7:22 AM
This reads like a movie script, props to Vincent for sticking to his guns despite the hierarchy.
Reposted by Théo Lisart-Liebermann
Le gouvernement : fait des réformes qui renforcent les inégalités
Les profs : refusent les réformes
Le gouvernement : oblige les profs à quand même les faire
Tout le monde : constate que les inégalités augmentent
Le gouvernement : accuse les profs en leur affichant une charte
Les profs : refusent les réformes
Le gouvernement : oblige les profs à quand même les faire
Tout le monde : constate que les inégalités augmentent
Le gouvernement : accuse les profs en leur affichant une charte
"Les biais et les stéréotypes ne reculent pas voire se renforcent" E Borne (France inter) "Les filles ont moins confiance en elles"
Une chartre sera affichée en salle des profs
Une chartre sera affichée en salle des profs
May 7, 2025 at 7:46 AM
Le gouvernement : fait des réformes qui renforcent les inégalités
Les profs : refusent les réformes
Le gouvernement : oblige les profs à quand même les faire
Tout le monde : constate que les inégalités augmentent
Le gouvernement : accuse les profs en leur affichant une charte
Les profs : refusent les réformes
Le gouvernement : oblige les profs à quand même les faire
Tout le monde : constate que les inégalités augmentent
Le gouvernement : accuse les profs en leur affichant une charte
Another new paper from our group: *Clifford and Non-Clifford Splitting in Quantum Circuits: Applications and ZX-Calculus Detection Procedure*
We introduce compilation procedure using the ZX-Calculus to identify Clifford and non-clifford borders in quantum circuits.
arxiv.org/abs/2504.16004
We introduce compilation procedure using the ZX-Calculus to identify Clifford and non-clifford borders in quantum circuits.
arxiv.org/abs/2504.16004
Clifford and Non-Clifford Splitting in Quantum Circuits: Applications and ZX-Calculus Detection Procedure
Classical simulation of quantum circuits is a pivotal part of the quantum computing landscape, specially within the NISQ era, where the constraints imposed by available hardware are unavoidable. The G...
arxiv.org
May 7, 2025 at 1:30 PM
Another new paper from our group: *Clifford and Non-Clifford Splitting in Quantum Circuits: Applications and ZX-Calculus Detection Procedure*
We introduce compilation procedure using the ZX-Calculus to identify Clifford and non-clifford borders in quantum circuits.
arxiv.org/abs/2504.16004
We introduce compilation procedure using the ZX-Calculus to identify Clifford and non-clifford borders in quantum circuits.
arxiv.org/abs/2504.16004
This is our first paper in a series of two, which tackles the question of trainability of shallow QAOA algorithms. We provide benchmarks for quasi-newton and natural gradient methods, in addition to introducing a simple secant-penalization in BFGS updates [1/2]
www.arxiv.org/abs/2504.16518
www.arxiv.org/abs/2504.16518
Preconditioning Natural and Second Order Gradient Descent in Quantum Optimization: A Performance Benchmark
The optimization of parametric quantum circuits is technically hindered by three major obstacles: the non-convex nature of the objective function, noisy gradient evaluations, and the presence of barre...
www.arxiv.org
May 7, 2025 at 1:26 PM
This is our first paper in a series of two, which tackles the question of trainability of shallow QAOA algorithms. We provide benchmarks for quasi-newton and natural gradient methods, in addition to introducing a simple secant-penalization in BFGS updates [1/2]
www.arxiv.org/abs/2504.16518
www.arxiv.org/abs/2504.16518
Reposted by Théo Lisart-Liebermann
Another turn in the Microsoft drama.
scottaaronson.blog?p=8669#comme...
scottaaronson.blog?p=8669#comme...
February 25, 2025 at 7:15 AM
Another turn in the Microsoft drama.
scottaaronson.blog?p=8669#comme...
scottaaronson.blog?p=8669#comme...
This is a bit of a personal admission: I thought for around one year that LiDAR systems were named after prof. Daniel Lidar.
There I said it.
There I said it.
January 20, 2025 at 12:32 PM
This is a bit of a personal admission: I thought for around one year that LiDAR systems were named after prof. Daniel Lidar.
There I said it.
There I said it.
Reposted by Théo Lisart-Liebermann
Have you ever wondered why diffusion models memorize and all initializations lead to the same training sample? As we show, this is because like in dynamic systems, the memorized sample acts as an attractor and a corresponding attraction basin is formed in the denoising trajectory.
December 4, 2024 at 9:03 PM
Have you ever wondered why diffusion models memorize and all initializations lead to the same training sample? As we show, this is because like in dynamic systems, the memorized sample acts as an attractor and a corresponding attraction basin is formed in the denoising trajectory.
PRIF and TU Darmstadt are hiring for cross-disciplinary positions for PhD and postdocs in arms control, mainly in nuclear engineering. RB appreciated !
www.cntrarmscontrol.org/news/snd-vac...
www.cntrarmscontrol.org/news/snd-vac...
SND Vacancies | CNTR
www.cntrarmscontrol.org
December 3, 2024 at 10:58 AM
PRIF and TU Darmstadt are hiring for cross-disciplinary positions for PhD and postdocs in arms control, mainly in nuclear engineering. RB appreciated !
www.cntrarmscontrol.org/news/snd-vac...
www.cntrarmscontrol.org/news/snd-vac...
Reposted by Théo Lisart-Liebermann
If the universe started out in a pure quantum state, how is anything in a mixed state now?
November 29, 2024 at 12:56 AM
If the universe started out in a pure quantum state, how is anything in a mixed state now?
Reposted by Théo Lisart-Liebermann
Hey #Quantumsky 👋🏾
This is an attempt at indexing the growing quantum community here on Bluesky. Please let me know if you'd like to be added to the list.
Genuinely happy to see what looks like a successful migration from the birdsite 😄
go.bsky.app/VHXg1yi
This is an attempt at indexing the growing quantum community here on Bluesky. Please let me know if you'd like to be added to the list.
Genuinely happy to see what looks like a successful migration from the birdsite 😄
go.bsky.app/VHXg1yi
November 25, 2024 at 4:18 PM
Hey #Quantumsky 👋🏾
This is an attempt at indexing the growing quantum community here on Bluesky. Please let me know if you'd like to be added to the list.
Genuinely happy to see what looks like a successful migration from the birdsite 😄
go.bsky.app/VHXg1yi
This is an attempt at indexing the growing quantum community here on Bluesky. Please let me know if you'd like to be added to the list.
Genuinely happy to see what looks like a successful migration from the birdsite 😄
go.bsky.app/VHXg1yi