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Learning in the quantum universe
I will present recent progress in building a rigorous theory to understand how scientists, machines, and future quantum computers could learn models of our quantum universe. The talk will begin...
Nov 23, 2022
First-principle approach to the superpositions of gravitational fields in atom interferometry
Understanding the fundamental nature of gravity at the interface with quantum theory is a major open question in theoretical physics. Recent progress in experiments has enabled probing the interaction of...
Nov 14, 2022
Causality and Ideal Measurements of Smeared Fields in Quantum Field Theory
The usual quantum mechanical description of measurements, unitary kicks, and other local operations has the potential to produce pathological causality violations in the relativistic setting of quantum field theory (QFT)...
Nov 17, 2022
Toys can't play: physical agents in Spekkens' theory
Information is physical, and for a physical theory to be universal, it should model observers as physical systems, with concrete memories where they store the information acquired through experiments and...
Oct 14, 2022
Phenomenological thermodynamics with multiple quantities of interest
Joint work (in progress) with Ladina Hausmann, Nuriya Nurgalieva and Renato Renner We can classify contemporary approaches to thermodynamics in roughly four camps: (1) Top-down microscopic approaches. These are for...
Oct 21, 2022
Locality bounds on quantum dynamics with measurements
In non-relativistic systems, the Lieb-Robinson Theorem imposes an emergent speed limit (independent of the relativistic limit set by c), establishing locality under unitary quantum dynamics and constraining the time needed...
Nov 08, 2022
Entanglement entropy in (1+1)-d with defects
In this talk I will explore perspectives of quantum entanglement in (1+1)-d systems in presence of defects. The talk consists of two parts. In the first part, I will talk...
Nov 01, 2022
Unlocking the Universe with quantum materials
Just seven years after their first detection, gravitational waves (GWs) have revealed the first glimpses of a previously hidden dark Universe. Using the GW signature of distant compact-object collisions, we...
Nov 16, 2022
A Universal Operator Growth Hypothesis
Thanks to the Lanczos algorithm, the Hamiltonian dynamics of any operator can be written as a hopping problem on a semi-infinite one-dimensional chain. Our hypothesis states that the hopping strength...
Oct 15, 2019
Symmetry indicators for topological materials
Many free-fermion topological phases can be diagnosed by analyzing a suitable collection of symmetry data. While the Fu-Kane parity criterion for topological insulators is an early example, the systematic generalization...
Oct 22, 2019