Silent Phase Qubit Based on d-Wave Josephson Junctions

Abstract

We report on design and fabrication of a new type of flux qubit that capitalizes on intrinsic properties of submicron YBCO grain boundary junctions. The operating point is protected from the fluctuations of the external fields, already on the classical level; the effects of external perturbations are absent, to the second or third order, depending on the character of the coupling. We propose an experiment to observe quantum tunneling and Rabi oscillations in the qubit. Estimate of the decoherence due to fluctuations of the external flux is presented.

3 pages, 3 figures

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Cited by in corpus (5)

• Theory of Macroscopic Quantum Tunneling in High-T_c c-Axis Josephson Junctions
• Multi-mode architectures for noise-resilient superconducting qubits
• Toroidal qubits: naturally-decoupled quiet artificial atoms
• Theory of two-dimensional macroscopic quantum tunneling in YBa${}_2$ Cu${}_3$ O${}_{7-\delta }$ Josephson junctions coupled to an LC circuit
• Dissipative phase transition in two-dimensional d-wave Josephson junctions