Dr. Ryan Tyler Requist “Induced gauge potentials in correlated

DIPARTIMENTO DI FISICA E ASTRONOMIA
"G. GALILEI" - DFA
AVVISO DI SEMINARIO
Seminari di Fisica Statistica e Teoria della Materia Condensata
Martedì 17 giugno 2014
ore 15:00
Aula R
Dr. Ryan Tyler Requist
SISSA-Scuola Internazionale Superiore di Studi Avanzati,
Via Bonomea 265, 34136 Trieste, Italy
“Induced gauge potentials in correlated
electron dynamics”
Synthetic gauge fields in optical lattices are under intense investigation as a way to simulate exotic
condensed matter phases in a well-controlled environment.
In this talk, I will show that induced magnetic gauge potentials appear generically in reduced descriptions
of quantum many body systems, even in ordinary cases like electron dynamics in molecules, quantum dots
and solids. In contrast to the gauge potentials induced by periodically shaking optical lattices, these gauge
potentials arise from the combination of interactions and nonadiabatic driving.
Consequences for charge and energy transfer are illustrated in the exact nonlinear dynamics of a threesite Hubbard ring driven into a periodic steady state.
Some surprising phenomena such as counterintuitive charge pumping and energy exchange are
observed. arxiv:1401.3719
L. Dell’Anna
F. Baldovin