Nonadditivity of decoherence rates in superconducting qubits
Nonadditivity of decoherence rates in superconducting qubits
We show that the relaxation and decoherence rates ${T}_{1}^{\ensuremath{-}1}$ and ${T}_{2}^{\ensuremath{-}1}$ of a qubit coupled to several noise sources are in general not additive, i.e., that the total rates are not the sums of the rates due to each individual noise source. To demonstrate this, we calculate the relaxation and …