Department of Mathematics and Computer Science

Speaker: Daniel Stack (Atom Computing)Abstract: This talk will describe recent progress on neutral-atom-based quantum computation at Atom Computing Inc. These results are enabled by a flexible platform capable of large qubit numbers, high-fidelity gates, arbitrary qubit connectivity, and mid-circuit measurement. I will describe how these features can enable circuits with large numbers of physical and logical qubits. I will also present recent demonstrations of techniques for reusing and replenishing qubits after mid-circuit measurement—key steps for enabling the execution of long error-correcting computation despite atom loss.

SDU and NAFA invite you to a webinar on systems thinking in science and technology education in primary and lower secondary school (K–12).The webinar brings together researchers and practitioners who will present current work with systems thinking in K–12 and invite participants to a shared reflection on the pedagogical opportunities and challenges.Speakers:[list][*]Jonas Hallström, Professor, Linköpings University: systems thinking in K–12 science education (in English)[*]Lykke Bertel, Associate Professor, AAlborg University, and Rea Lavi, Associate Professor, Massachusetts Institute of Technology: The SAFO model – a pedagogical framework for teaching and assessing systems thinking (in English)[*]Mette Elsnab Olesen, matematikfaglig medarbejder, Matematikcenter: Hvordan kan der undervises i systembegrebet i NT i 3. klasse med inspiration fra SAFO modellen? (in Danish).[/list]Facilitator: Martin Sillasen, Docent, VIA, Research Leader CESE/NAFAAt NiSE webinars, Danish science education researchers meet to further develop the science education knowledge ecology.It is about ensuring that everyone both receives knowledge and contributes knowledge and experiences within the pedagogical and scientific work of science education.The NiSE webinars are organized by the STEM Education Research Center – FNUG and the Center of Excellence in Science Education/Naturfagsakademiet (CESE/NAFA). NiSE is the name of the network: Network in STEM Education.Everyone is welcome.

The new mathematics curricula are now in effect - but what do they actually mean for teaching and student learning?

Speaker: Thomas Klein Kvorning (​KTH Royal Institute of Technology). Abstract: Simulating quantum many-body systems is fundamentally challenging because quantum states encode correlations that cannot be decomposed into local parts, leading to an exponential growth of required resources with system size. Yet physical observables are typically local: they are fully determined by density matrices of small subsystems. This raises a central question: can local density matrices be time-evolved without explicitly tracking long-range correlations? In this talk, I address this question using the framework of the information lattice, a scale-resolved decomposition of the information content of a quantum state. This construction provides a precise notion of where information resides in a quantum system, both in space and across length scales, and thereby offers a diagnostic of how correlations build up dynamically. I will show how this perspective reveals regimes in which local degrees of freedom are exactly decoupled from long-range entanglement, as well as how it can guide the development of approximate numerical methods for ab initio simulation of condensed matter systems.

Speaker: Julio C. Magdalena de la Fuente (Freie Universität Berlin).Abstract: TBA

Speaker: Olga Solodovnikova (University of Southern Denmark).Abstract: In this seminar, I will introduce continuous quantum variables [1], which are used to describe systems of oscillators, that is, systems with infinite Hilbert spaces such as photonic systems or the vibrational motion of trapped ions. To build a universal and fault-tolerant quantum computer with a continuous-variable system, it is necessary to encode a qubit in an oscillator, perform gates from the universal gate set, and measure stabilisers to implement error correction.  In the second part of the introductory seminar, I will introduce the measurement-based quantum computing framework for optical systems, in which Gottesman-Kitaev-Preskill (GKP) states are injected into a cluster state, and homodyne/heterodyne detectors are used to i) apply gates via teleportation and ii) measure stabilisers [2]. Lastly, I will discuss the experimental progress on building a measurement-based quantum computer [3], where, in particular, the generation of GKP states [4] is a major bottleneck due to photon loss. [1] Braunstein and van Loock. “Quantum Information with Continuous Variables.” Rev. Mod. Phys. 77, no. 2 (2005).[2] Gottesman, et al. “Encoding a Qubit in an Oscillator.” Physical Review A 64, no. 1 (2001): 012310. [3] Aghaee Rad, H., T. Ainsworth, R. N. Alexander, et al. “Scaling and Networking a Modular Photonic Quantum Computer.” Nature 638, no. 8052 (2025): 912–19. [4] Larsen, M. V., J. E. Bourassa, S. Kocsis, et al. “Integrated Photonic Source of Gottesman–Kitaev–Preskill Qubits.” Nature 642, no. 8068 (2025): 587–91.

Speaker: Olga Solodovnikova (University of Southern Denmark).Abstract: In this research seminar, I will discuss techniques for simulating continuous-variable circuits, which typically fall into two categories: phase-space simulation (Gaussian), and Fock-space simulation. I will present the methodology behind a CV circuit simulation library, which I developed during my PhD, which extends the Gaussian representation to systems that can be written as linear combinations of Gaussians. By approximating Fock states as superpositions of coherent states, any finite-energy CV state can be represented in this formalism. Furthermore, the complexity of this algorithm scales with the stellar rank of the non-Gaussian circuit elements. In the two manuscripts, I showcase the library by simulating and optimising GKP state preparation circuits in the presence of loss. Having said that, the formalism is applicable to any continuous-variable system. [1] Solodovnikova et al. “Fast Simulations of Continuous-Variable Circuits Using the Coherent State Decomposition.” arXiv:2508.06175 [quant-ph][2] Solodovnikova et al. “The Loss Tolerance of Cat Breeding for Fault-Tolerant Grid State Generation.” arXiv:2508.06193 [quant-ph]

Want to know what is going on behind the scenes at IMADA?Come and join us for 2 x 20 min. inspiring talks while you enjoy a free “casual after-work” beer with your fellow student, colleague or teacher.This time Postdoc Serhii Petrovychi (Topic: From Classroom to Living Lab: Rethinking STEM Learning through Sustainability Projects) and Associate Professor Fabian Haiden (Topic: Counting Problems: from Billiards to Quantum States) will each spend 20 minutes each telling you about their current research.

The Cake Club is a new and cozy initiative that meets four times each semester with free coffee, cake, and great company.So whether you study AI, Applied Mathematics, Computer Science, Mathematics, or Mathematics-Economics, you are invited.Remember to bring your fellow students (lecturers are also welcome).The club meetings are held at the IMADA Forskertorv.You can read more in the Facebook group IMADA-students.

Speaker: Ben Brown (IBM).Abstract: TBA

Poster Session and presentation by Prajakt Pande, Associate Professor, Aarhus University

The Cake Club is a new and cozy initiative that meets four times each semester with free coffee, cake, and great company.So if you study Data Science, you are invited.Remember to bring your fellow students (lecturers are also welcome).The club meetings are held at the IMADA Forskertorv.You can read more in the Facebook group IMADA-students.

Abdullah Akgül defends her PhD thesis at a public lecture: “Probabilistic Reinforcement Learning for Sample-Efficient Control”.The chairman of the assessment committee, Professor Arthur Zimek, will act as chairman at the defence.The PhD defence takes place in U181 (Ø22-601b-2).All are welcome.

How are SDU students using AI chatbots as personalized learning tools — and how can science teachers guide students towards fruitful and academically appropriate uses?

The conference focuses on how empowerment arises through knowledge, and how it is strengthened and supported through interdisciplinary and cross-sectoral collaboration. This year's theme: FROM COGNITION TO CAPACITY Foundations of Empowering Knowledge

The conference focuses on how empowerment arises through knowledge, and how it is strengthened and supported through interdisciplinary and cross-sectoral collaboration. This year's theme: FROM COGNITION TO CAPACITY Foundations of Empowering Knowledge

Adelina conducted a teaching experiment using figure construction to make student reasoning explicit and support integrative understanding of metabolic pathways.

SDU and NAFA invite you to a webinar where PhD Sizwe Nxasana presents his research on how to support teachers in unlearning old habits and adopting new, more student-centered teaching methods – and on identifying which forms of professional development actually work to make this happen. This presentation offers a unique insight into how project-based learning (PBL) is being adopted and developed in a South African context.At NiSE webinars, Danish science education researchers meet to further develop the science education knowledge ecology.It is about ensuring that everyone both receives knowledge and contributes knowledge and experiences within the pedagogical and scientific work of science education.The NiSE webinars are organized by the STEM Education Research Center – FNUG and the Center of Excellence in Science Education/Naturfagsakademiet (CESE/NAFA). NiSE is the name of the network: Network in STEM Education.This webinar is the second in a series of three during the autumn semester of 2025.Everyone is welcome.