超导量子电路中单量子态的相干操控和测量

项目名称： 超导量子电路中单量子态的相干操控和测量

项目编号： No.11474152

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 于海峰

作者单位： 南京大学

项目金额： 90万元

中文摘要： 基于约瑟夫森结的超导量子电路既可以作为量子比特来开展量子计算的研究，又可以作为固态人工原子在芯片上实现原子物理和量子光学等实验的基础研究。这些研究中，单量子态的相干操控和测量是两个基本课题。在本项目中我们通过电磁诱导透明、Aulter-Townes 劈裂、真空拉比振荡和Fock 态制备的实验来开展三能级人工原子和电路量子电动力学中单量子态的调控研究；通过色散读取方案来实现超导量子比特的非破坏性测量。这些实验的开展为理解自然原子与人工原子的差别、拓展固态量子电路的研究领域，为超导量子计算中单量子态的精确操控和精密测量打下良好的研究基础。

中文关键词： 超导量子计算；电路量子电动力学；量子非破坏性测量；约瑟夫森结；单量子态

英文摘要： Superconducting quantum circuits based on Josephson junctions can not only be used as qubits to study superconducting quantum computing but also be acted as artifical atoms to explore atomic physics and quantum optical problems on a chip. Manipulation and readout of single quantum state are basic issues in both studies. In this proposal, we will carry out following experiments such as Electromagnetically Induced Transparency ( EIT), Aulter-Townes splitting, vacuum Rabi oscillation and preparing Fock states to realize manipulation of single macroscopic quantum states in three-level atoms and circuit quantum electrodynamics (circuit QED) systems. Besides, we also realize Quantum Non-Demalition measurements (QND) used dispersive readout technique in superconducting quantum bit. These experiments provide a good foundation for understanding the difference between natural atoms and artifical atoms, expanding research field of solid quantum circuits ， accurate manipulation and precise readout of single quantum state in superconducting quantum computing.

英文关键词： Superconducting quantum computing;Circuit quantum electrodynamics;Quantum non-demalition measurement;Josepshon junction;Single quantum state