INVESTIGADORES
ERMANN Leonardo
artículos
Título:
Quantum Parameter Space of Dissipative Directed Transport
Autor/es:
LEONARDO ERMANN; GABRIEL G. CARLO
Revista:
PHYSICAL REVIEW E
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2015 vol. 91 p. 10903 - 10908
ISSN:
1539-3755
Resumen:
Quantum manifestations of isoperiodic stable structures (QISSs) have a crucial role in the current behavior ofquantum dissipative ratchets. In this context, the simple shape of the ISSs has been conjectured to be an almostexclusive feature of the classical system. This has drastic consequences for many properties of the directedcurrents, the most important one being that it imposes a significant reduction in their maximum values, thusaffecting the attainable efficiency at the quantum level. In this work we prove this conjecture by means ofcomprehensive numerical explorations and statistical analysis of the quantum states. We are able to describe thequantum parameter space of a paradigmatic system for different values of eff in great detail. Moreover, thanks tothis we provide evidence on a mechanism that we call parametric tunneling by which the sharp classical bordersof the regions in parameter space become blurred in the quantum counterpart. We expect this to be a commonproperty of generic dissipative quantum systems.