108 research outputs found
A chiral Maxwell Demon
We investigate the role of chirality on the performance of a Maxwell demon
implemented in a quantum Hall bar with a localized impurity. Within a
stochastic thermodynamics description we investigate the ability of such a
demon to drive a current against a bias. We show that the ability of the demon
to perform is directly related to its ability to extract information from the
system. The key features of the proposed Maxwell demon are the topological
properties of the quantum Hall system. The asymmetry of the electronic
interactions felt at the localized state when the magnetic field is reversed
joined to the fact that we consider energy dependent (and asymmetric) tunneling
barriers that connect such state with the Hall edge modes allow the demon to
properly work.Comment: 5 pages, 5 figure
Dynamical Coulomb blockade of thermal transport
The role of energy exchange between a quantum system and its environment is
investigated from the perspective of the Onsager conductance matrix. We
consider the thermoelectric linear transport of an interacting quantum dot
coupled to two terminals under the influence of an electrical potential and a
thermal bias. We implement in our model the effect of coupling to
electromagnetic environmental modes created by nearby electrons within the
P(E)-theory of dynamical Coulomb blockade. Our findings relate the lack of some
symmetries among the Onsager matrix coefficients with an enhancement of the
efficiency at maximum power and the occurrence of the heat rectification
phenomenon.Comment: 9 pages, 7 figure
Un epistolari, malauradament curt, de fra Miquel Colom, del tercer ordre regular, fill adoptiu d'Inca
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