Speaker
Vito Giuseppe Viesti
(Istituto Nazionale di Fisica Nucleare)
Description
A privileged role in the description of a quantum system is played by symmetries, which are operators that remain constant in time (in the Heisenberg picture). It is well known that these are represented by operators that commute with the Hamiltonian of the system.
Quantum symmetries can be further classified based on their stability with respect to perturbations of the Hamiltonian. There are robust symmetries, which, despite the perturbation, stay close to their initial values throughout the evolution. On the other hand, fragile symmetries accumulate significant deviations from their initial values over time due to the perturbation. Our goal is to provide a precise characterization of both robust and fragile symmetries.
Primary authors
Prof.
Marilena Ligabò
(Università di Bari)
Prof.
Paolo Facchi
(Istituto Nazionale di Fisica Nucleare)
Vito Giuseppe Viesti
(Istituto Nazionale di Fisica Nucleare)
