141 citations · 165 across the 3 of their papers we have counts for
8 papers
Quasiparticle poisoning and Josephson current fluctuations induced by Kondo impurities
Lara Faoro, Alexei Kitaev, Lev B. Ioffe
We introduce a toy model that allows us to study the physical properties of a spin impurity coupled to the electrons in the superconducting island. We show that when the coupling o…
Microscopic origin of low frequency flux noise in Josephson circuits
Lara Faoro, Lev B. Ioffe
We analyze the data and discuss their implications for the microscopic origin of the low frequency flux noise in superconducting circuits. We argue that this noise is produced by s…
Entanglement detection for electrons via witness operators
Lara Faoro, Fabio Taddei
We discuss an implementation of the entanglement witness, a method to detect entanglement with few local measurements, in systems where entangled electrons are generated both in th…
Quantum two level systems and Kondo-like traps as possible sources of decoherence in superconducting qubits
Lara Faoro, Lev B. Ioffe
We discuss the origin of decoherence in Josephson junction qubits. We find that two level systems in the surrounding insulator cannot be the dominant source of noise in small qubit…
Quantum Logical States and Operators for Josephson-like Systems
Lara Faoro, Francesco A. Raffa, Mario Rasetti
We give a formal algebraic description of Josephson-type quantum dynamical systems, i.e., Hamiltonian systems with a cos theta-like potential term. The two-boson Heisenberg algebra…
Models of environment and T_1 relaxation in Josephson Charge Qubits
Lara Faoro, Joakim Bergli, Boris L. Altshuler +1
A theoretical interpretation of the recent experiments of Astafiev et. al. on the T_1-relaxation rate in Josephson Charge Qubits is proposed. The experimentally observed reproducib…