Matthias Rosenkranz
@mrosenkranz.bsky.social
Team lead quantum algorithms at Quantinuum. Formerly ultracold atoms and quant finance. He/him. https://mathstodon.xyz/@rosenkranz
Our new quantum computer Helios is out. Take a look at this paper for technical details of its design, operations, and benchmarks.
arxiv.org/abs/2511.05465
arxiv.org/abs/2511.05465
Helios: A 98-qubit trapped-ion quantum computer
We report on Quantinuum Helios, a 98-qubit trapped-ion quantum processor based on the quantum charge-coupled device (QCCD) architecture. Helios features $^{137}$Ba$^{+}$ hyperfine qubits, all-to-all c...
arxiv.org
November 10, 2025 at 11:45 AM
Our new quantum computer Helios is out. Take a look at this paper for technical details of its design, operations, and benchmarks.
arxiv.org/abs/2511.05465
arxiv.org/abs/2511.05465
Our paper elucidating resources required for quantum Gibbs state preparation via Lindblad simulation is now published in @quantum-journal.bsky.social
quantum-journal.org/papers/q-202...
quantum-journal.org/papers/q-202...
September 2, 2025 at 6:24 PM
Our paper elucidating resources required for quantum Gibbs state preparation via Lindblad simulation is now published in @quantum-journal.bsky.social
quantum-journal.org/papers/q-202...
quantum-journal.org/papers/q-202...
Reposted by Matthias Rosenkranz
🧵 1/? Today #quantinuum announced Guppy, the new programming language my team has been developing, and Selene the new simulator that goes with it. This is the software stack that supports our new Helios #quantum computer, and it successors. #quantumcomputing
www.quantinuum.com/blog/built-f...
www.quantinuum.com/blog/built-f...
Built for All: Introducing Our New Software Stack
Our next-generation quantum computer, Helios, will come online this year as more than a new chip. It will arrive as a full-stack platform that sets a new standard for the industry.
www.quantinuum.com
August 20, 2025 at 11:19 PM
🧵 1/? Today #quantinuum announced Guppy, the new programming language my team has been developing, and Selene the new simulator that goes with it. This is the software stack that supports our new Helios #quantum computer, and it successors. #quantumcomputing
www.quantinuum.com/blog/built-f...
www.quantinuum.com/blog/built-f...
Reposted by Matthias Rosenkranz
Our latest paper is out. In a joint work with Marcello Benedetti and Matthias Rosenkranz ( @mrosenkranz.bsky.social ) , we present a new quantum algorithm for solving Lyapunov equations.
scirate.com/arxiv/2508.0...
arxiv.org/abs/2508.04689
scirate.com/arxiv/2508.0...
arxiv.org/abs/2508.04689
August 7, 2025 at 3:21 PM
Our latest paper is out. In a joint work with Marcello Benedetti and Matthias Rosenkranz ( @mrosenkranz.bsky.social ) , we present a new quantum algorithm for solving Lyapunov equations.
scirate.com/arxiv/2508.0...
arxiv.org/abs/2508.04689
scirate.com/arxiv/2508.0...
arxiv.org/abs/2508.04689
We have an opening for a research scientist in the quantum algorithms team at Quantinuum. This is permanent in London or Cambridge, UK. Details: jobs.eu.lever.co/quantinuum/2...
Quantinuum - Research Scientist, Quantum Algorithms
We are seeking a Research Scientist for our quantum algorithms team in London or Cambridge, UK. Our team leads the development, implementation, simulation, and application of quantum algorithms for co...
jobs.eu.lever.co
June 11, 2025 at 1:13 PM
We have an opening for a research scientist in the quantum algorithms team at Quantinuum. This is permanent in London or Cambridge, UK. Details: jobs.eu.lever.co/quantinuum/2...
Reposted by Matthias Rosenkranz
What's this? Some very nice work by my colleagues.
#quantinuum #quantumcomputing #ftqc #quantum
arxiv.org/abs/2505.09133
#quantinuum #quantumcomputing #ftqc #quantum
arxiv.org/abs/2505.09133
Quantum Error-Corrected Computation of Molecular Energies
We present the first demonstration of an end-to-end pipeline with quantum error correction (QEC) for a quantum computation of the electronic structure of molecular systems. Using Quantinuum H2-2, we c...
arxiv.org
May 16, 2025 at 12:18 AM
What's this? Some very nice work by my colleagues.
#quantinuum #quantumcomputing #ftqc #quantum
arxiv.org/abs/2505.09133
#quantinuum #quantumcomputing #ftqc #quantum
arxiv.org/abs/2505.09133
Happy that our paper on state preparation for multivariate functions is out in @quantum-journal.bsky.social. We've also open sourced the code. Give it a go in your algorithm: github.com/CQCL/mvsp
April 10, 2025 at 1:57 PM
Happy that our paper on state preparation for multivariate functions is out in @quantum-journal.bsky.social. We've also open sourced the code. Give it a go in your algorithm: github.com/CQCL/mvsp
Reposted by Matthias Rosenkranz
Hi #quantum bluesky 👋 In arxiv.org/abs/2503.20870 with #Quantinuum, Fermioniq, Caltech, EPFL, TUM we show Quantinuum's H2 ion-trap #quantumcomputer can simulate dynamical evolution of a 2D Ising model at late times and sizes pushing beyond classical means(MPS, PEPS, sparse Pauli propagation, NN).
Digital quantum magnetism at the frontier of classical simulations
The utility of near-term quantum computers for simulating realistic quantum systems hinges on the stability of digital quantum matter--realized when discrete quantum gates approximate continuous time ...
arxiv.org
March 30, 2025 at 10:37 PM
Hi #quantum bluesky 👋 In arxiv.org/abs/2503.20870 with #Quantinuum, Fermioniq, Caltech, EPFL, TUM we show Quantinuum's H2 ion-trap #quantumcomputer can simulate dynamical evolution of a 2D Ising model at late times and sizes pushing beyond classical means(MPS, PEPS, sparse Pauli propagation, NN).
Here's one from our algorithms team and QuSoft/CWI
Marcello Benedetti, Harry Buhrman, Jordi Weggemans
Complement Sampling: Provable, Verifiable and NISQable Quantum Advantage in Sample Complexity
https://arxiv.org/abs/2502.08721
Complement Sampling: Provable, Verifiable and NISQable Quantum Advantage in Sample Complexity
https://arxiv.org/abs/2502.08721
February 14, 2025 at 3:53 PM
Here's one from our algorithms team and QuSoft/CWI
Reposted by Matthias Rosenkranz
If you’re running randomized benchmarking on your quantum computer, stop and read our paper!
arxiv.org/pdf/2502.00154
arxiv.org/pdf/2502.00154
arxiv.org
February 4, 2025 at 7:09 PM
If you’re running randomized benchmarking on your quantum computer, stop and read our paper!
arxiv.org/pdf/2502.00154
arxiv.org/pdf/2502.00154
Reposted by Matthias Rosenkranz
The deadline for talk submissions at QCTiP 2025 is coming up! Consider submitting a talk until January 10.
January 6, 2025 at 9:59 AM
The deadline for talk submissions at QCTiP 2025 is coming up! Consider submitting a talk until January 10.
Very happy that our new paper on quantum Gibbs state preparation is out today 🎅
scirate.com/arxiv/2412.1...
We hope this bridges the gap between the recent theoretical advances in Lindblad simulation algorithms for quantum Gibbs sampling and their eventual quantum hardware implementation.
scirate.com/arxiv/2412.1...
We hope this bridges the gap between the recent theoretical advances in Lindblad simulation algorithms for quantum Gibbs sampling and their eventual quantum hardware implementation.
Lindblad engineering for quantum Gibbs state preparation under the eigenstate thermalization hypothesis
Building upon recent progress in Lindblad engineering for quantum Gibbs state preparation algorithms, we propose a simplified protocol that is shown to be efficient under the eigenstate thermalization...
scirate.com
December 24, 2024 at 9:08 AM
Very happy that our new paper on quantum Gibbs state preparation is out today 🎅
scirate.com/arxiv/2412.1...
We hope this bridges the gap between the recent theoretical advances in Lindblad simulation algorithms for quantum Gibbs sampling and their eventual quantum hardware implementation.
scirate.com/arxiv/2412.1...
We hope this bridges the gap between the recent theoretical advances in Lindblad simulation algorithms for quantum Gibbs sampling and their eventual quantum hardware implementation.
Reposted by Matthias Rosenkranz
Interesting question by Mark Wilde on Twitter:
There have been many breakthrough algorithms for thermal state preparation recently. Does any of them prepare a canonical purification of a thermal state? i.e, the following state
(\sqrt{e^{-H}/Z} ⊗ I) ∑_i |i⟩ ⊗ |i⟩
with |i⟩ = computational basis
There have been many breakthrough algorithms for thermal state preparation recently. Does any of them prepare a canonical purification of a thermal state? i.e, the following state
(\sqrt{e^{-H}/Z} ⊗ I) ∑_i |i⟩ ⊗ |i⟩
with |i⟩ = computational basis
December 11, 2024 at 5:04 PM
Interesting question by Mark Wilde on Twitter:
There have been many breakthrough algorithms for thermal state preparation recently. Does any of them prepare a canonical purification of a thermal state? i.e, the following state
(\sqrt{e^{-H}/Z} ⊗ I) ∑_i |i⟩ ⊗ |i⟩
with |i⟩ = computational basis
There have been many breakthrough algorithms for thermal state preparation recently. Does any of them prepare a canonical purification of a thermal state? i.e, the following state
(\sqrt{e^{-H}/Z} ⊗ I) ∑_i |i⟩ ⊗ |i⟩
with |i⟩ = computational basis
Reposted by Matthias Rosenkranz
Submissions for QCTiP 2025 are now open.
December 5, 2024 at 10:45 AM
Submissions for QCTiP 2025 are now open.
Reposted by Matthias Rosenkranz
it will be interesting to see whether this "classical attack" gives anything for the "optimization by decoded quantum interferometry" paper
arxiv.org/abs/2408.08292
arxiv.org/abs/2408.08292
Optimization by Decoded Quantum Interferometry
We introduce Decoded Quantum Interferometry (DQI), a quantum algorithm for reducing classical optimization problems to classical decoding problems by exploiting structure in the Fourier spectrum of th...
arxiv.org
December 2, 2024 at 2:17 PM
it will be interesting to see whether this "classical attack" gives anything for the "optimization by decoded quantum interferometry" paper
arxiv.org/abs/2408.08292
arxiv.org/abs/2408.08292
Reposted by Matthias Rosenkranz
The plot thickens:
"While all the proofs in the paper are correct to the best of our knowledge, we have been recently informed about a classical attack on our polynomial system."
"While all the proofs in the paper are correct to the best of our knowledge, we have been recently informed about a classical attack on our polynomial system."
When it rains new quantum algorithms with a potential advantage, it pours:
arxiv.org/abs/2411.14697
arxiv.org/abs/2411.14697
Quantum Advantage via Solving Multivariate Quadratics
In this work, we propose a new way to (non-interactively, verifiably) demonstrate Quantum Advantage by solving the average-case $\mathsf{NP}$ search problem of finding a solution to a system of (under...
arxiv.org
December 2, 2024 at 2:00 PM
The plot thickens:
"While all the proofs in the paper are correct to the best of our knowledge, we have been recently informed about a classical attack on our polynomial system."
"While all the proofs in the paper are correct to the best of our knowledge, we have been recently informed about a classical attack on our polynomial system."
So close! Somebody please post something really good 🙏
November 29, 2024 at 6:14 PM
So close! Somebody please post something really good 🙏
Happy No arXiv Announcements Day to those who celebrate
November 29, 2024 at 8:38 AM
Happy No arXiv Announcements Day to those who celebrate