Optimal tuning of solid-state quantum gates: A universal two-qubit gate
Elisabetta Paladino, Andrea Mastellone, Antonio D’Arrigo, G. Falci · Physical Review B · 2010
We present a general route to reduce inhomogeneous broadening in nanodevices due to $1/f$ noise. We apply this method to a universal two-qubit gate and demonstrate that for selected optimal couplings, a high-efficient gate can be implemented even in the presence of $1/f$ noise. Entanglement degradation due to interplay of $1/f$ and quantum noise is quantified via the concurrence. A charge-phase $\sqrt{\text{i}\ensuremath{-}\text{SWAP}}$ gate for spectra extrapolated from single-qubit experiments is analyzed.