中国物理B ›› 2019, Vol. 28 ›› Issue (2): 24204-024204.doi: 10.1088/1674-1056/28/2/024204

所属专题: TOPICAL REVIEW — Fundamental research under high magnetic fields

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Physics of quantum coherence in spin systems

Maimaitiyiming Tusun(麦麦提依明·吐孙), Xing Rong(荣星), Jiangfeng Du(杜江峰)   

  1. 1 CAS Key Laboratory of Microscale Magnetic Resonance and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;
    2 Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
    3 School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, China
  • 收稿日期:2018-11-16 修回日期:2018-12-07 出版日期:2019-02-05 发布日期:2019-02-05
  • 通讯作者: Jiangfeng Du E-mail:djf@ustc.edu
  • 基金资助:

    Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0306600 and 2016YFB0501603), the Fund from the Chinese Academy of Sciences (Grant Nos. GJJSTD20170001, QYZDY-SSW-SLH004, and QYZDB-SSW-SLH005), and the Program from Anhui Initiative in Quantum Information Technologies, China (Grant No. AHY050000).

Physics of quantum coherence in spin systems

Maimaitiyiming Tusun(麦麦提依明·吐孙)1,2,3, Xing Rong(荣星)1,2, Jiangfeng Du(杜江峰)1,2   

  1. 1 CAS Key Laboratory of Microscale Magnetic Resonance and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;
    2 Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
    3 School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, China
  • Received:2018-11-16 Revised:2018-12-07 Online:2019-02-05 Published:2019-02-05
  • Contact: Jiangfeng Du E-mail:djf@ustc.edu
  • Supported by:

    Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0306600 and 2016YFB0501603), the Fund from the Chinese Academy of Sciences (Grant Nos. GJJSTD20170001, QYZDY-SSW-SLH004, and QYZDB-SSW-SLH005), and the Program from Anhui Initiative in Quantum Information Technologies, China (Grant No. AHY050000).

摘要:

Quantum computation provides a great speedup over its classical counterpart in solving some hard problems. The advantages of quantum computation come from the coherent superposition principle of quantum mechanics. Spin system is one of the most significant candidates to realize quantum computation. In this review, we focus on the recent experimental progress related to quantum coherence and some fundamental concepts such as the uncertainty principle in the spin systems. We shall first briefly introduce the quantum description of qubit, coherence, and decoherence. Based on this picture, preserving quantum coherence and detection of weak magnetic fields are presented. We also discuss the realization of precise quantum coherent control, adiabatic quantum factorization algorithm, and two aspects of uncertainty relations.

关键词: coherence, decoherence, magnetic resonance techniques, uncertainty relation

Abstract:

Quantum computation provides a great speedup over its classical counterpart in solving some hard problems. The advantages of quantum computation come from the coherent superposition principle of quantum mechanics. Spin system is one of the most significant candidates to realize quantum computation. In this review, we focus on the recent experimental progress related to quantum coherence and some fundamental concepts such as the uncertainty principle in the spin systems. We shall first briefly introduce the quantum description of qubit, coherence, and decoherence. Based on this picture, preserving quantum coherence and detection of weak magnetic fields are presented. We also discuss the realization of precise quantum coherent control, adiabatic quantum factorization algorithm, and two aspects of uncertainty relations.

Key words: coherence, decoherence, magnetic resonance techniques, uncertainty relation

中图分类号:  (Coherence)

  • 42.25.Kb
03.65.Yz (Decoherence; open systems; quantum statistical methods) 87.80.Lg (Magnetic and paramagnetic resonance) 03.65.Ta (Foundations of quantum mechanics; measurement theory)