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Journal Article

Resonant quantum gates in circuit quantum electrodynamics


Marquardt,  F.
Marquardt Group, Associated Groups, Max Planck Institute for the Science of Light, Max Planck Society;
University of Erlangen Nuremberg, Inst Theoret Phys;

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Haack, G., Helmer, F., Mariantoni, M., Marquardt, F., & Solano, E. (2010). Resonant quantum gates in circuit quantum electrodynamics. Physical Review B, 82(2): 024514. doi:10.1103/PhysRevB.82.024514.

Cite as: https://hdl.handle.net/21.11116/0000-0001-D796-3
We propose the implementation of fast resonant gates in circuit quantum electrodynamics for quantum information processing. We show how a suitable utilization of three-level superconducting qubits inside a resonator constitutes a key tool to perform diverse two-qubit resonant gates, improving the operation speed when compared to slower dispersive techniques. To illustrate the benefit of resonant two-qubit gates in circuit quantum electrodynamics, we consider the implementation of a two-dimensional cluster state in an array of N x N superconducting qubits by using resonant controlled-phase and one-qubit gates, where the generation time grows linearly with N. For N = 3, and taking into account decoherence mechanisms, a fidelity over 60% for the generation of this cluster state is obtained.