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Coherence and Coulomb blockade in single electron devices: a unified treatment of interaction effects
S. Florens, P. San Jose, F. Guinea +1
We study the interplay between Coulomb blockade and the Kondo effect in quantum dots. We use a self-consistent scheme which describes mesoscopic devices in terms of a collective ph…
Interlayer hopping properties of electrons in layered metals
M. A. H. Vozmediano, M. P. Lopez-Sancho, F. Guinea
A formalism is proposed to study the electron tunneling between extended states, based on the spin-boson Hamiltonian previously used in two-level systems. It is applied to analyze…
Influence of external information in the minority game
M. A. R. de Cara, F. Guinea
The influence of a fixed number of agents with the same fixed behavior on the dynamics of the minority game is studied. Alternatively, the system studied can be considered the mino…
Single-channel transmission in gold one-atom contacts and chains
G. Rubio-Bollinger, C. de las Heras, E. Bascones +3
We induce superconductivity by proximity effect in thin layers of gold and study the number of conduction channels which contribute to the current in one-atom contacts and atomic w…
Assisted hopping in the Anderson impurity model: A flow equation study
T. Stauber, F. Guinea
We investigate the effect of assisted hopping in the Anderson impurity model. We use the flow equation method, which, by means of unitary transformations, generates a sequence of H…