INVESTIGADORES
CALVO Hernan Laureano
congresos y reuniones científicas
Título:
(Charla) Interaction induced adiabatic transport through quantum dots out of equilibrium
Autor/es:
HERNAN L. CALVO; JANINE SPLETTSTOESSER; MAARTEN R. WEGEWIJS
Lugar:
Berlin
Reunión:
Congreso; 76th Annual Meeting of the Deutsche Physikalische Gesellschaft; 2012
Institución organizadora:
Deutsche Physikalische Gesellschaft
Resumen:
Geometric phases arise in the quantum state of a system whose parameters
are slowly varied along a closed contour, e.g. a quantum dot in a
rotating magnetic field. In this work, we present a novel, generally
applicable quantum transport theory for adiabatically driven, strongly
interacting nanosystems characterized by non-trivial geometric phases in
their dynamics.We account exactly for the local many-body interaction
and applied non-linear voltages on a general type of quantum dot. We
develop a perturbation theory in the tunnel coupling to the electrodes
where the crucial ingredient is the time-dependent modulationof both
the quantum energies (dynamical phases) as well as the wave functions
(inducing geometric phases), both in the quantum dot and/or the
reservoirs. We discuss the transport properties of such devices where
the experimental signatures of geometric phases appear in the charge and
spin pumping induced by the time-dependent parameters.