The paper  "Estimating Quantum Hamiltonians via Joint Measurements of Noisy Noncommuting Observable" has been published in Physical Review Letters. This work presents a new strategy to efficiently estimate energies of quantum Hamiltonians based on implementing a joint measurement of noisy (unsharp) versions non-commuting Pauli observables. 

Link to the published paper: here

Link to arxiv version: here

Workshop: Near-term Quantum Computing 2023 that will take place in Warsaw on 22-24 March 2023. We aim at bringing world-class experts working on quantum computing, especially those focusing on characterising the computational power and investigating possible practical applications of quantum computing devices consisting of a limited number of imperfect qubits. Contributions from all branches of physics, mathematics, information theory and computer science that have bearing on the objective are welcome. The format of the workshop will be invited talks complemented by the poster session. For more details and registration see here.

Two scientist from Theory of Quantum Computing Group (Warsaw) were recognized during 3rd Ingarden Memorial Session orgranized by KCIK. 

Joanna Majsak got Boroze KCIK award for the best Bachelor thesis in quantum information defended in Poland in 2022.  Daniel McNulty presented a distinguished talk in recognition for the best quantum information paper prepared in Poland in 2022. Recordings of the talks of Joanna and Daniel can be found here.

The Advanced School on Optimization Methods in Quantum Information, co-organized by Felix Huber from the Quantum Error Correction group, will be hosted at ICMAT Madrid, 27 Feb - 03 Mar 2023

The paper "Dimension-free entanglement detection in multipartite Werner states" (collaboration with Igor Klep, Victor Magron & Jurij Volčič) has been published in Communications in Mathematical Phsics.

Link to Comm. Math. Phys.
Link to arXiv

The papers "Continuous thermomajorization and a complete set of laws for Markovian thermal processes" and "Optimizing thermalizations" by Kamil Korzekwa and Matteo Lostaglio has been selected by the editors of Physical Review A and Physical Review Letters as Editors' Suggestions. Moreover, the works have been covered in Physics Viewpoint.

Link to 1st arXiv preprint
Link to 2nd arXiv preprint
Link to Phys. Rev. A paper
Link to Phys. Rev. Lett. paper
Link to Physics Viewpoint coverage

The presentation "Optimizing thermalizations" by Kamil Korzekwa has been chosen as the best early-career talk at the Quantum Thermodynamics 2022 conference.

Link to talk   

The paper "Fast estimation of outcome probabilities for quantum circuits" by Hakop Pashayan, Oliver Reardon-Smith and Kamil Korzekwa has been published in PRX Quantum.

Link to arXiv preprint
Link PRX Quantum paper

The paper "Efficient learning and benchmarking of readout noise cross-talk models in near-term quantum devices", by Filip B. Maciejewski, Oskar Słowik, Jan Tuziemski, and Michał Oszmaniec will be presented at the Quantum Resource Estimation
QRE2022.

The paper "Fermion Sampling: A Robust Quantum Computational Advantage Scheme Using Fermionic Linear Optics and Magic Input States" (arxiv version) by Michał Oszmaniec, Ninnat Dangniam, Mauro E.S. Morales and Zoltán Zimborás had been published in PRX Quantum.

The paper "Saturation and recurrence of quantum complexity in random quantum circuits" by Michał Oszmaniec et al, and, the paper "Dimension-free entanglement detection in multipartite Werner states" (arxiv version) by Felix Huber, Igor Klep, Victor Magron, Jurij Volčič will be presented at the 17th Conference on the Theory of Quantum Computation, Communication and Cryptography at the University of Illinois at Urbana- Champaign.

The paper Epsilon-nets, unitary designs and random quantum circuits by Michał Oszmaniec, Adam Sawicki, Michał Horodecki has been published in the IEEE Transactions on Information Theory.

Link to arxiv preprint
Link to IEEE Transactions on Information Theory paper 

The paper "Encoding classical information in quantum resources" by Kamil Korzekwa, Zbigniew Puchała, Marco Tomamichel and Karol Życzkowski has been published in IEEE Transactions on Information Theory.

Link to arXiv preprint
Link IEEE Trans. Inf. Theory paper

The article Entropic proofs of Singleton bounds for quantum error-correcting codes (collaboration with Andreas Winter from Universitat Autònoma de Barcelona and Markus Grassl from ICTQT Gdansk) has been accepted by IEEE Transactions of Information Theory and is available in early-access and on arXiv. 

The paper Algebraic and geometric structures inside the Birkhoff polytope by Grzegorz Rajchel-Mieldzioć, Kamil Korzekwa,  Zbigniew Puchała, Karol Życzkowski has been published in the Journal of Mathematical Physics.

Link to arxiv preprint

Link to J. Math. Phys. paper 

Dr Fereshte Shahbeigi joins Quantum Resources group as a post-doctoral researcher. 

The “Theory of Quantum Computing” group from CTP PAS led by Michał Oszmaniec  has been given access to prototypes of quantum computers based on superconducting qubits and trapped ions. This access will be utilized to study the structure of readout errors and develop new strategies to mitigate them.

Funding for the research, over $40,000 in total, has been awarded through grants to access quantum computers via cloud platforms of Amazon, Microsoft, and Google. This access will allow experiments to conduct experiments on Rigetti, IonQ and Honeywell devices.

Link to article in AWS Braket blog. 

In  this  preprint Adam Burchardt, Wojciech Bruzda and Karol Zyczkowski  from the Jagiellonian University and Grzegorz Rajchel Mieldzioć from the Center for Theoretical Physics  together with collaborators from india proposed an analytic solution to the quantum variant of the famous combinatorial problem of  36 officers of Euler. The paper accepted for publication in Physical Review Letters in 2022  was covered in the popular science magazine Quanta (link to the article).

See an arxiv preprint 

Two works of scientist belonging to our consortium will be presented in this year’s Quantum Information Processing (QIP) conference

• Optimizing thermalizations by Kamil Korzekwa and Matteo Lostalgio
  
• Fermion Sampling: a robust quantum computational advantage scheme using fermionic linear optics and magic input states by Michał Oszmaniec, Ninnat Dangniam, Mauro E.S. Morales, Zoltán Zimborás, link to arxiv paper

QIP is the most important annual conference in the field of theoretical quantum computing and quantum information. In 2022 the conference will take place between 7 and 11th of March in Pasadena, USA. 

Michał Oszmaniec was one of the panelist in the panel “Quantum Technologies in Poland: Quantum infrastructure and Quantum Computing” organized within United Nations’ Internet Governance Forum 2021 in Katowice.

Link to recording of the discussion 

The paper Fermion Sampling: a robust quantum computational advantage scheme using fermionic linear optics and magic input states by Michał Oszmaniec, Ninnat Dangniam, Mauro E.S. Morales, Zoltán Zimborás has been selected as Distinguished Talk during 2nd Ingarden Memorial Session organized by KCIK. 

Link to arxiv preprint
Link to recording of the talk 

The paper Dephasing superchannels by Zbigniew Puchała, Kamil Korzekwa, Roberto Salazar, Paweł Horodecki, Karol Życzkowski (joint collaboration of Quantum Resources and Quantum Machine Learning groups) has been selected by the editors of Physical Review A to be an Editors' Suggestion.

Link to arxiv preprint
Link to Phys. Rev. A paper 

Felix Huber of the Quantum Error Correction group has been invited to talk at the 8th European Congress of Mathematics in Portoroz. The European Congress of Mathematics happens every four years and is the second largest international conference of the mathematics community.