380 citations · 783 across the 8 of their papers we have counts for
3 papers · 1 filter
Subgap states in dirty superconductors and their effect on dephasing in Josephson qubits
Alessandro Silva, Lev B. Ioffe
We present a theory of the subgap tails of the density of states in a diffusive superconductor containing magnetic impurities. We show that the subgap tails have two contributions:…
Superconducting tetrahedral quantum bits
M. V. Feigel'man, L. B. Ioffe, V. B. Geshkenbein +2
We propose a new design for a quantum bit with four superconducting islands in the topology of a symmetric tetrahedron, uniformly frustrated with one-half flux-quantum per loop and…
Protected Qubits and Chern Simons theories in Josephson Junction Arrays
B. Doucot, M. V. Feigel'man, L. B. Ioffe +1
We present general symmetry arguments that show the appearance of doubly denerate states protected from external perturbations in a wide class of Hamiltonians. We construct the sim…