GEOMETRY AND DYNAMICS

Session

Thursday 15 - afternoon

15 Jan 2026, 14:30

Aula Magna (Sede delle Accademie Napoletane)

3. TBA

Dariusz Chruściński

15/01/2026, 14:30

Talk

8. Beyond the boundary: Unfolding hidden unitarity

Paolo Facchi

15/01/2026, 15:00

Talk

Abstract:
Hermitian operators that fail to be self-adjoint are ubiquitous in quantum mechanics, from boundary-value problems and singular interactions to effective descriptions of open systems. Their non-self-adjointness is often interpreted as a fundamental loss of unitarity or reversibility. Building on Naimark’s dilation theorem, I will show how non-unitarity emerges from the folding and...

17. An invitation to quantum reference frames: the perspective-neutral way

Fabio Mele

15/01/2026, 16:00

Talk

Abstract:
In standard textbook treatments, reference frames serve merely to describe physical situations and are taken to be external to the systems under study. Yet many physically relevant settings — such as those encountered in gauge theories, gravity, or quantum communication — lack any meaningful external frame. This raises the question of how to describe physics in the absence of such a...