Controllable coupling between flux qubit and nanomechanical resonator by magnetic field

作者：Fei Xue, Yahui Wang, C. P. Sun, Hajime Okamoto, Hiroshi Yamaguchi, Kouichi Semba · 发表于：New Journal of Physics · 年份：2007 · DOI：10.1088/1367-2630/9/2/035 · 被引用次数：89 · 研究领域：Mechanical and Optical Resonators、Quantum Information and Cryptography、Quantum and electron transport phenomena

We propose an active mechanism for coupling the quantized mode of a nanomechanical resonator to the persistent current in the loop of a superconducting Josephson junction (or phase slip) flux qubit. This coupling is independently controlled by an external coupling magnetic field. The whole system forms a novel solid-state cavity quantum electrodynamics (QED) architecture in the strong coupling limit. This architecture can be used to demonstrate quantum optics phenomena and coherently manipulate the qubit for quantum information processing. The coupling mechanism is applicable for more generalized situations where the superconducting Josephson junction system is a multi-level system. We also address the practical issues concerning experimental realization.