Speakers and Slides

No pure boost principle in kappa-Poincaré, quantum reference frames and QG phenomenology

Quantum reference frames and (quantum) Galilei groups

PDF of the slides 

Verifying quantum aspect of gravitational fields by quantum probes

PDF of the slides 

What are quantum reference frames, what is quantum about them and what is their purpose?

In this talk I will introduce quantum reference frames and argue that the question of what is truly quantum about them is subtle and hard to quantify in a clear way, unlike non-locality via Bell inequality violation for instance. I will use as an example the finite mass kick-back effect of quantum reference frames as shown by Aharonov and Kaufherr in their seminal paper. In a second part of the talk I will ask what is the purpose of quantum reference frame transformations. I suggest that historically in physics changes of reference frame have served two purposes: simplifying problems via coordinate changes and theory construction (via the principle of relativity). I will give examples of how quantum reference frames have been/could be used in both cases. 

PDF of the slides 

Quantum systems as gravitational sources: what do we need to test the quantum nature of gravity?

Quantum reference frames, quantum spacetime and decoherence

Quantum frames, subsystems and gravity

I will describe how to define subsystems relative to quantum reference frames and how this extends to gravity. This leads to a relativity of subsystems that, in a sense to be explained, can be thought of as a generalization of the relativity of simultaneity. I will discuss a few of the ensuing physical consequences.

Extensions of quantum theory consistent with no-signaling and applications to quantum+gravity models

PDF of the slides 

Quantum Observers in Noncommutative Geometry

I will argue that a quantum spacetime, as the one described by a noncommutative geometry, requires not only quantum symmetries, but also a quantization of the observers, or reference frames. I will discuss the cases of κ, θ and ϱ. Minkowski spacetimes, and their deformation of the symmetries.

Towards an Operational Foundation of Quantum Reference Frames

PDF of the slides 

Classical vs Quantum theories: when do quantum effects matter in gravity and quantum information?

We will discuss the differences and similarities between a classical (but relativistic and local) field theory and a relativistic quantum field theory. We will identify regimes where a quantum field theoretical description is not necessary to explain phenomenology of matter that interacts through fields. We will then apply what we learned to the study of gravity induced entanglement experiments to venture how much their experimental realization can actually say about quantum gravity.

PDF of the slides 

SUq(2) and its noncommutative reference frames

Multi-agent paradoxes in physical theories

Time of arrival in relativistic and quantum phenomena

PDF of the slides 

Quantum symmetries of the rho-Minkowski spacetime

We discuss the quantum Poincaré symmetries of the rho-Minkowski spacetime. These are described by a quantum group which exhibits a bicrossproduct structure, analogously the  kappa-Poincaré group associated with the kappa-Minkowski spacetime.