Optimal tuning of solid-state quantum gates: A universal two-qubit gate

Details Optimal tuning of solid-state quantum gates: A universal two-qubit gate Optimal tuning of solid-state quantum gates: A universal two-qubit gate

2009-06-17

arxiv.org/abs/0906.3115v2

Phys. Rev. B 81, 052502 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Replaced with published version. Modified manuscript

Scientific paper

10.1103/PhysRevB.81.052502

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 $\sqrt{{\rm i-SWAP}}$ gate for spectra extrapolated from single qubit experiments is analyzed.

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