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Interplay between pairing and exchange in small metallic dots
G. Falci, Rosario Fazio, A. Mastellone
We study the effects of the mesoscopic fluctuations on the competition between exchange and pairing interactions in ultrasmall metallic dots when the mean level spacing is comparab…
Communicating Josephson Qubits
F. Plastina, G. Falci
We propose a scheme to implement a quantum information transfer protocol with a superconducting circuit and Josephson charge qubits. The information exchange is mediated by an L-C…
Scaling of Entanglement close to a Quantum Phase Transitions
A. Osterloh, L. Amico, G. Falci +1
In this Letter we discuss the entanglement near a quantum phase transition by analyzing the properties of the concurrence for a class of exactly solvable models in one dimension. W…
Decoherence and 1/f noise in Josephson qubits
E. Paladino, L. Faoro, G. Falci +1
We propose and study a model of dephasing due to an environment of bistable fluctuators. We apply our analysis to decoherence of Josephson Qubits, induced by background charges pre…