中国物理B ›› 2013, Vol. 22 ›› Issue (11): 110313-110313.doi: 10.1088/1674-1056/22/11/110313

所属专题: TOPICAL REVIEW — Quantum information

• TOPICAL REVIEW—Quantum information • 上一篇    下一篇

Progress in superconducting qubits from the perspective of coherence and readout

钟有鹏a, 李春燕a, 王浩华a, 陈宇b   

  1. a Department of Physics, Zhejiang University, Hangzhou 310027, China;
    b Department of Physics, University of California, Santa Barbara, CA 93106, USA
  • 收稿日期:2013-10-15 出版日期:2013-09-28 发布日期:2013-09-28
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB927404), the National Natural Science Foundation of China (Grant Nos. 11222437 and 11174248), the Natural Science Foundation of Zhejiang Province, China (Grant No. LR12A04001), the Program for New Century Excellent Talents in University of Ministry of Education of China (Grant No. NCET-11-0456), and the Synergetic Innovation Center of Quantum Information and Quantum Physics.

Progress in superconducting qubits from the perspective of coherence and readout

Zhong You-Peng (钟有鹏)a, Li Chun-Yan (李春燕)a, Wang Hao-Hua (王浩华)a, Chen Yu (陈宇)b   

  1. a Department of Physics, Zhejiang University, Hangzhou 310027, China;
    b Department of Physics, University of California, Santa Barbara, CA 93106, USA
  • Received:2013-10-15 Online:2013-09-28 Published:2013-09-28
  • Contact: Wang Hao-Hua, Chen Yu E-mail:hhwang@zju.edu.cn;ychen@physics.ucsb.edu
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB927404), the National Natural Science Foundation of China (Grant Nos. 11222437 and 11174248), the Natural Science Foundation of Zhejiang Province, China (Grant No. LR12A04001), the Program for New Century Excellent Talents in University of Ministry of Education of China (Grant No. NCET-11-0456), and the Synergetic Innovation Center of Quantum Information and Quantum Physics.

摘要: Superconducting qubits are Josephson junction-based circuits that exhibit macroscopic quantum behavior and can be manipulated as artificial atoms. Benefiting from the well-developed technology of microfabrication and microwave engineering, superconducting qubits have great advantages in design flexibility, controllability, and scalability. Over the past decade, there has been rapid progress in the field, which greatly improved our understanding of qubit decoherence and circuit optimization. The single-qubit coherence time has been steadily raised to the order of 10 to 100 μs, allowing for the demonstration of high-fidelity gate operations and measurement-based feedback control. Here we review recent progress in the coherence and readout of superconducting qubits.

关键词: superconducting qubit, Josephson junction, quantum non-demolition measurement, decoherence

Abstract: Superconducting qubits are Josephson junction-based circuits that exhibit macroscopic quantum behavior and can be manipulated as artificial atoms. Benefiting from the well-developed technology of microfabrication and microwave engineering, superconducting qubits have great advantages in design flexibility, controllability, and scalability. Over the past decade, there has been rapid progress in the field, which greatly improved our understanding of qubit decoherence and circuit optimization. The single-qubit coherence time has been steadily raised to the order of 10 to 100 μs, allowing for the demonstration of high-fidelity gate operations and measurement-based feedback control. Here we review recent progress in the coherence and readout of superconducting qubits.

Key words: superconducting qubit, Josephson junction, quantum non-demolition measurement, decoherence

中图分类号:  (Quantum computation architectures and implementations)

  • 03.67.Lx
03.65.Yz (Decoherence; open systems; quantum statistical methods) 85.25.Cp (Josephson devices)