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

Abstract

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

Replaced with published version. Modified manuscript

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• 1/f noise: implications for solid-state quantum information
• Design of a Lambda system for population transfer in superconducting nanocircuits
• Entanglement degradation in the solid state: interplay of adiabatic and quantum noise
• Dynamical decoupling and dephasing in interacting two-level systems
• Decoherence times of universal two-qubit gates in the presence of broad-band noise
• Superconducting qubit manipulated by fast pulses: experimental observation of distinct decoherence regimes
• Two-qubit gate operations in superconducting circuits with strong coupling and weak anharmonicity
• Spin-echo entanglement protection from random telegraph noise
• Driven-state relaxation of a coupled qubit-defect system in spin-locking measurements
• Broadband noise decoherence in solid-state complex architectures
• Charge carrier density noise in graphene: effect of localized/delocalized traps
• Probing Ultrastrong Light-Matter Coupling in Open Quantum Systems
• High-fidelity two-qubit gates via dynamical decoupling of local 1/f noise at optimal point
• Coherent trapping in small quantum networks
• Low-frequency critical current noise in graphene Josephson junctions in the open-circuit gate voltage limit
• Open-loop quantum control of small-size networks for high-order cumulants and cross-correlations sensing