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PROGRAM (19 Contributed+5 Invited+2 Tutorials)
Monday, 14.9.2026
12:50-13:50 Conference Bus from Bratislava to Vienna Airport
14:00-15:30 Conference Bus from Vienna Airport to Mikulov
15:30 ARRIVAL and ACCOMMODATION
16:00 REGISTRATION and REFRESHEMENT @venue
17:00-19:00 EVENING SESSION (chaired by Michal Sedlák)
17:00-17:40 I Teiko Heinosaari Quantum advantage in communication ΞΞΞQuantum and classical communication systems of the same dimension are often compared through success probabilities in communication tasks. I will first recall the well know fact that standard performance measures fail to reveal operational differences between classical and quantum communication in the basic communication task. By introducing more general framework, one can identify communication tasks in which qubits outperform classical bits. This perspective reveals new forms of quantum advantage that remain hidden in the basic communication. I will explain the minimal setting where the quantum advantage exists.
17:40-18:40 T Ivan Šupić Self-testing in quantum information theory ΞΞΞ What can observed measurement statistics tell us about the quantum system that produced them, if we make no assumptions about the internal functioning of the devices? Self-testing addresses this question in a particularly striking way: certain nonlocal correlations uniquely determine the underlying quantum state and measurements, up to the unavoidable local equivalences. It therefore turns Bell-type experiments into a powerful tool not only for witnessing nonclassical behaviour, but for identifying the quantum realization responsible for it. In this tutorial, I will introduce the basic ideas and techniques of self-testing, with particular emphasis on its conceptual and foundational aspects. We will see how self-testing sharpens our understanding of quantum nonlocality and of the information encoded in observable correlations, and how it provides a rigorous framework for reasoning about quantum systems in a device-independent manner. I will then discuss several of its applications, ranging from quantum cryptography and randomness certification to questions at the interface of quantum foundations and theoretical computer science. In particular, I will explain how self-testing became an important ingredient in fundamental results in quantum complexity theory, culminating in its role in the proof of MIP∗ = RE. Along the way, I will present the main techniques behind self-testing proofs and illustrate how a seemingly simple question about measurement statistics leads to surprisingly rigid conclusions about the underlying quantum world
19:00 Welcome dinner, Hotel Tanzberg (adress: Husova 331/8, Mikulov)
Tuesday, 15.9.2026
07:30-08:30 Breakfast in hotels
09:00-12:45 MORNING SESSION (chaired by Daniel Reitzner)
09:00-09:40 I Augustin Vanrietvelde Causal Decompositions of 1D Quantum Cellular Automata, with a detour via theory of partitions of quantum systems ΞΞΞ Understanding quantum theory's causal structure stands out as a major matter, since it radically departs from classical notions of causality. We present advances in the research program of causal decompositions, which investigates the existence of an equivalence between the causal and the compositional structures of unitary channels. Our results concern one-dimensional Quantum Cellular Automata (1D QCAs), i.e. unitary channels over a line of N quantum systems (with or without periodic boundary conditions) that feature a causality radius r: a given input cannot causally influence outputs at a distance more than r. We prove that, for N \geq 4 r + 1, 1D QCAs all admit causal decompositions: a unitary channel is a 1D QCA if and only if it can be decomposed into a unitary routed circuit of nearest-neighbour interactions, in which its causal structure is compositionally obvious. This provides the first constructive form of 1D QCAs with causality radius one or more, fully elucidating their structure. In addition, we show that this decomposition can be taken to be translation-invariant for the case of translation-invariant QCAs. Our proof of these results makes use of innovative algebraic techniques, leveraging a new framework for capturing partitions into non-factor sub-C* algebras.
09:40-10:20 I Vedran Dunjko Can we have quantum advantages in machine learning please? ΞΞΞ Quantum machine learning has produced plenty of quantum models. Quantum advantages have been less cooperative. What would it take for one to survive training costs, finite-size experiments—and a determined classical competitor? I will discuss two attempts to make the question less slippery: learning with privileged quantum information, where quantum data help only during training, and quantum generative models that can be benchmarked classically while remaining hard to sample from. Along the way, we will ask what theory can actually certify—and whether “classically testable” and “quantumly advantageous” can coexist.
10:20-10:45 C Kyrylo Simonov Higher-order transformations of bidirectional quantum processes
10:45-11:10 Coffee & Refreshment
11:10-11:35 C Francesco Arzani Complex zeros of the wavefunction as theoretical and experimental signatures of non-Gaussianity
11:35-12:00 C Lin Htoo Zaw Rigorously and vigorously extracting nonclassicality certificates from a few characteristic function measurements
12:00-12:25 C Remigiusz Augusiak Device-independent certification of Majorana fermions and a new self-testing equivalence
12:25-12:50 C Arnau Diebra Huertas Quantum Advantage in Identifying the Parity of Permutations with Certainty
12:50-13:00 CONFERENCE PHOTO
13:00-13:45 Lunch @ Hotel Galant (Mlýnská 2, Mikulov)
14:00-16:00 AFTERNOON SESSION (chaired by Teiko Heinosaari)
14:00-14:40 I Peter Stano Colored correlated noise and quantum computation ΞΞΞ The threshold theorems on which the quantum error correction hinges usually assume uncorrelated noise (both in space and time). In any real device, the noise is, to some degree, correlated (both in space and time). What such correlations imply for the feasibility of quantum computation is largely unknown. I will review our recent work on characterization of noise correlations in current silicon spin qubit hardware [1-4]. It culminates in Ref.[5], where we quantify the spatial extent of noise correlations in a five-qubit silicon array and assess their impact on quantum error correction. We identify two distinct sources of correlated noise: global magnetic field drifts that generate perfectly correlated fluctuations, and charge noise from two-level fluctuators that produces short-range correlations decaying within neighboring qubits. The magnetic drift is an example of noise so strongly correlated that it can compromise quantum error correction. In contrast, the measured charge noise correlations are moderate, electrically tunable, and compatible with fault-tolerant operation with minimal qubit overhead.
[1] J. Yoneda et al., Noise-correlation spectrum for a pair of spin qubits in silicon, Nature Physics 19, 1793 (2023)
[2] J. S. Rojas-Arias et al., Spatial noise correlations beyond nearest-neighbor in 28Si/SiGe spin qubits, Phys. Rev. Applied 20, 054024 (2023)
[3] J. S. Rojas-Arias et al., The origins of noise in the Zeeman splitting of spin qubits in natural-silicon devices, (arxiv:2408.13707)
[4] J. S. Rojas-Arias et al., Inferring charge noise source locations from correlations in spin qubits, Phys. Rev. Lett. 136, 027001 (2026)
[5] J. S. Rojas-Arias et al., Scaling of silicon spin qubits under correlated noise, (arxiv:2603.03051)
14:40-15:05 C Gerard Anglès Munné Combining moment matrices, symmetric extension, and Lovász theta: ΦE8 is entangled
15:05-15:30 C Timothée Hoffreumon On the experimental falsification of Real Quantum Theory
15:30-15:55 C Paolo Abiuso Measurement-device-independent certification for quantum optics
16:00-16:45 Coffee & Refreshment
16:00-18:30 POSTER SESSION
18:30-19:00 Buses to Valtice
19:00-23:00 CONFERENCE DINNER (Saloon of wines, Valtice)
22:30-23:00 Buses to Mikulov
Wednesday, 16.9.2026
08:00-08:45 Breakfast in hotels
09:00-13:00 MORNING SESSION (chaired by Francesco Buscemi)
09:00-10:00 T Karen Hovhannisyan Quantum work and its measurement ΞΞΞWork is a central notion in both mechanics and thermodynamics, being the only touching point between the two theories. When its full statistics is required, classical mechanics provides a natural description in terms of phase-space trajectories, whereas no analogous prescription exists for accessing work statistics in the quantum regime. A central challenge in quantum thermodynamics is therefore to measure work in coherent processes without distorting the energetics of the unmeasured evolution. In this tutorial, I will give a general overview of existing approaches to this problem through the lens of their compatibility with two fundamental physical principles: energy conservation and fluctuation relation. I will then argue in favor of an operational measurement scheme based on the abstract notion of variation in the Heisenberg-picture Hamiltonian. In a landscape constrained by various no-go theorems, this scheme strikes a good balance between conflicting desirable conditions. Most importantly, it preserves coherences and thereby faithfully reproduces the work of the unmeasured process, while inducing minimal backaction on both the state and the energetics. This scheme requires only a single measurement, a feature that can be exploited to construct a Maxwell-demon protocol capable of outperforming energy-based feedback engines in coherent work extraction.
10:00-10:25 C Elisabet Roda-Salichs Sequential analysis in a continuous spin-noise quantum sensor
10:25-10:50 Coffee & Refreshment
10:50-11:30 I Francesco Cosco Pulse-Level Quantum Computing: From Leakage Suppression to Hardware-Aware Algorithms ΞΞΞ Quantum computers are typically programmed through sequences of logical gates. While this abstraction greatly simplifies application development, it hides much of the underlying hardware physics dynamics and limits the opportunities for optimization. Pulse-level access exposes the physical control signals driving the quantum processor and enables a closer integration between hardware, software, and applications. In this talk, I will discuss how pulse-level control can be used to improve the performance of superconducting quantum processors. Starting from the challenges posed by noise, leakage, and limited coherence times, I will present recent work on geodesic-based optimal control for low-leakage gate design, pulse-level optimization of variational quantum algorithms, and scheduling-aware control strategies for superconducting architectures.
11:30-11:55 C Wojciech Bruzda Equivalence of Genuine Multipartite Entanglement and Nonlocality of Nearly Symmetric Multiqubit Pure States
11:55-12:20 C Lewis Wooltorton Chain rules for conditional entropies in quantum cryptography: limitations and improvements
12:20-12:45 C Marek Winczewski Quantification of the energy consumption of entanglement distribution
12:45-12:50 Cipher and sightseeing invitation
13:00-14:00 Lunch @ Hotel Tanzberg (adress: Husova 331/8, Mikulov)
13:45-14:00 SIGHSEEING/CIPHER GAME BEGINS (tower Břitová věž)
14:00-18:30 CONFERENCE SIGHTSEEING WALK (visit of Jewish cemetery, cave, castle, viewpoint, ...)
18:30-19:00 Ciphergame registration
19:00-20:00 Dinner @ conference venue (venue open until 23:00)
12:45-23:00 CIPHERGAME
Thursday, 17.9.2026
07:30-08:30 Breakfast in hotels
09:00-12:30 MORNING SESSION (chaired by Mario Ziman)
09:00-09:25 C Himanshu Badhani Thermodynamics of quantum information processing
09:25-09:50 C Fionnuala Curran Unambiguous randomness from a quantum state
09:50-10:15 C Santiago Llorens Exact identification of unknown unitary processes
10:15-10:40 C Marco Wiedmann On the convergence of the variational quantum eigensolver and quantum optimal control
10:40-11:10 Coffee & Refreshment
11:10-11:35 C Samgeeth Puliyil Semi-device-independent channel identification with communication matrices
11:35-12:00 C Tamal Guha Strong Inequivalence of Quantum Nonlocal Resources
12:00-12:25 C Libor Caha Layer codes as partially self-correcting quantum memories
12:30-12:45 Takeaway Lunch
12:45-14:30 Conference bus to Vienna Airport and Bratislava
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