Előadó: José A. Hoyos (Universidade de São Paulo (host: Juhász Róbert))
Cím: Dynamical Griffiths singularities
Dátum: 2022. július 19., kedd, 10 óra
Helyszín: 1-es épület Tanácsterem
We investigate the effects of impurities on the unitary evolution of an interacting quantum system after a quench. For a large variety of quench protocols, the impurities become locally highly excited while the bulk practically remains in its ground state. As a consequence, the system's early-times dynamics is dominated by impurities and new dynamical quantum phase transitions appear. Finally, we interpret our results as a dynamical analog of the Griffiths singularities in equilibrium thermodynamics.