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Mardi 19 avril, 2022 - 14:00
Dynamical Griffiths singularities
José A. Hoyos (Université de São Paulo, Brésil)
par - 19 avril 2022
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 the impurities and new dynamical quantum phase transitions appear. Finally, we interpret our results as a dynamical analog of the Griffiths singularities in equilibrium thermodynamics.
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