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Research

Our research focuses on three interconnected areas that together aim to understand the fundamental nature of spacetime, quantum mechanics, and their deep connections.

Quantum Gravity

Quantum Gravity

Understanding how spacetime and gravity emerge through the holographic principle and AdS/CFT correspondence.

Quantum Chaos

Quantum Chaos

Exploring the deep connections between quantum chaos, e.g. scrambling or spectral chaos, and gravitational physics through black hole dynamics and thermalization.

Quantum Simulation

Quantum Simulation

Engineering quantum systems in the laboratory to probe strong correlations, quantum chaos, with the ultimate goal to creat holographic states of matter in the laboratory.

Krylov Complexity

Krylov Complexity

Krylov complexity quantifies operator growth and information spreading in quantum systems, bridging quantum chaos and computational complexity. Krylov complexity is also emerging as a crucial component in our understanding of spacetime emergence.

sonner group

department of theoretical physics
university of geneva

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© 2026 julian sonner. department of theoretical physics, university of geneva.