摘要
超导量子比特是人工固态量子系统,在低温和弱耗散条件下,具有量子化的能级结构.这些能级之间的间隔可以随外加偏置电磁场连续变化,不同能级在某些偏置场可能形成量子系统中所特有的免交叉.最近研究成果表明,利用这些免交叉,可以在固态量子比特中实现Landau-Zener-Stckelberg(LZS)干涉,为测量系统的能谱、表征系统与环境的耦合、实现量子逻辑门、产生量子纠缠等提供了一个便捷的新手段.
Superconducting qubits are artificial solid state quantum systems which present quantized energy level at low temperature and low dissipation. The energy difference between levels can be tuned by external driving electro-magnetic field, leading to avoided level crossings under certain conditions. Recent research has shown Landau-Zener-Sttickelberg（LZS） interference can be realized in solid state qubits with such avoided level crossings. This provides a new method for the measurement of energy spectroscopy, the characterization of coupling between quantum system and environment, as well as the realization of quantum logic gates and quantum entanglement.
出处
《中国科学：物理学、力学、天文学》
CSCD
北大核心
2013年第5期579-593,共15页
Scientia Sinica Physica,Mechanica & Astronomica
基金
国家自然科学基金(批准号:10725415
91021003
11274156)
中华人民共和国科技部(编号:2011CB922104
2011CBA00200)
江苏省自然科学基金(编号:BK2010012)
江苏高校优势学科建设工程资助项目
