Foundations of quantum information
Logarithmic depth of random quantum circuits in the absence of quantum error correction.the
Foundations of quantum information studies the mathematical principles governing quantum information processing and computation. Our research develops a deeper understanding of entanglement, quantum resources, computational complexity and the fundamental limits of quantum technologies. We investigate which information-processing tasks quantum systems can perform efficiently, which advantages quantum computation can offer over classical methods, and which limitations are unavoidable. A particular focus is on understanding the capabilities and limitations of quantum computers in the absence of quantum error correction, identifying what can and cannot be achieved on noisy quantum devices from a fundamental perspective.
Selected recent group publications
- Noise-induced shallow circuits and absence of barren plateaus
Nature Phys. 22, 751 (2026) - The unbearable hardness of deciding about magic
arXiv:2602.22330 (2026) - Entanglement theory with limited computational resources
Nature Physics 21, 1847 (2025) - Quantum metrology in the finite-sample regime
PRX Quantum 6, 030336 (2025) - Exponentially tighter bounds on limitations of quantum error mitigation
Nature Physics 20, 1648 (2024) - Linear growth of quantum circuit complexity
Nature Physics 18, 528 (2022) - Entangling power and quantum circuit complexity
Physical Review Letters 127, 020501 (2021) - Multi-party entanglement in graph states
Physical Review A 69, 062311 (2004)
Group reviews
- Mind the gaps: The fraught road to quantum advantage
Nature Physics 22, in press (2026) - Computational advantage of quantum random sampling
Reviews of Modern Physics 95, 035001 (2023) - Introduction to the basics of entanglement theory in continuous-variable systems
International Journal of Quantum Information 1, 479 (2003)