FAU² Workshop: Quantum Gravity Meets Quantum Information – Foundations, Frameworks and Frontiers

Session

3 Tue

7 Jul 2026, 15:00

ECAP Laboratory Building

79. Mutual Information Across QRF Perspectives

Viktoria Kabel

07/07/2026, 15:00

invited talk

In quantum information theory, most standard notions depend crucially on how we partition the world into subsystems, a choice encoded in the tensor product structure of the Hilbert space. Yet, the subsystem structure has been shown to depend on the choice of quantum reference frame (QRF). This observation underlies many interesting features of QRFs, such as the relativity of entanglement,...

74. Classical Gravity Meets Classical Information

Eugenio Bianchi (Penn State)

07/07/2026, 15:40

invited talk

As two classical black holes inspiral and merge, they emit a significant amount of energy and angular momentum in the form of gravitational waves—a phenomenon now routinely observed by the LIGO-Virgo-KAGRA collaboration. Predicting the mass and spin of the final black hole typically requires solving Einstein’s equations through highly accurate numerical-relativity simulations. Surprisingly,...

96. TBA

Kasia Rejzner

07/07/2026, 16:20

invited talk

86. Covariant quantization of perturbative gravitational null rays

Josh Kirklin (Perimeter Institute)

07/07/2026, 17:30

invited talk

I’ll describe recent work with Laurent Freidel in which we quantize the perturbative gravitational data on a null ray in a gauge-invariant manner. The main technical difficulty is due to anomalies in quantum diffeomorphism invariance. I'll explain how these originate in the use of a background time dependent renormalization procedure, and I’ll describe how to eliminate the anomalies by...

91. Reduced phase space quantisation and quantum reference frames

Thomas Thiemann (FAU Erlangen-Nuremberg)

07/07/2026, 18:10

contributed talk

Abstract:
Reduced phase space quantisation of general relativity is a promising route to
quantum gravity. We show that this offers a natural interface with quantum reference frames. The talk focuses on conceptual ideas and connections with related
research areas such as constraint quantisation, relational and Dirac observables and addresses some frequently asked questions that arise in this context.

87. Quantum Reference Frames and Relational Entanglement Entropy

Francesco Sartini (OIST)

07/07/2026, 18:50

contributed talk

At the interface of quantum gravity and quantum information, growing evidence suggests that spacetime structure can be understood through quantum information-theoretic notions, with entanglement playing a central role. Yet, in the presence of gauge or diffeomorphism constraints, the notion of subsystems, crucial to define entanglement, becomes subtle: the Hilbert space does not factorize, and...