中国物理B ›› 2013, Vol. 22 ›› Issue (11): 110312-110312.doi: 10.1088/1674-1056/22/11/110312

所属专题: TOPICAL REVIEW — Quantum information

• TOPICAL REVIEW—Quantum information • 上一篇    下一篇

Disorder and decoherence in coined quantum walks

张融a, 秦豪a, 唐宝a, 薛鹏a b   

  1. a Department of Physics, Southeast University, Nanjing 211189, China;
    b State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
  • 收稿日期:2013-10-08 出版日期:2013-09-28 发布日期:2013-09-28
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11004029 and 11174052), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2010422), the Ph.D. Program of the Ministry of Education of China, the Excellent Young Teachers Program of Southeast University of China, the National Basic Research Program of China (Grant No. 2011CB921203), and the Open Fund from the State Key Laboratory of Precision Spectroscopy of East China Normal University.

Disorder and decoherence in coined quantum walks

Zhang Rong (张融)a, Qin Hao (秦豪)a, Tang Bao (唐宝)a, Xue Peng (薛鹏)a b   

  1. a Department of Physics, Southeast University, Nanjing 211189, China;
    b State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
  • Received:2013-10-08 Online:2013-09-28 Published:2013-09-28
  • Contact: Xue Peng E-mail:gnep.eux@gmail.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11004029 and 11174052), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2010422), the Ph.D. Program of the Ministry of Education of China, the Excellent Young Teachers Program of Southeast University of China, the National Basic Research Program of China (Grant No. 2011CB921203), and the Open Fund from the State Key Laboratory of Precision Spectroscopy of East China Normal University.

摘要: This article aims to provide a review on quantum walks. Starting form a basic idea of discrete-time quantum walks, we will review the impact of disorder and decoherence on the properties of quantum walks. The evolution of the standard quantum walks is deterministic and disorder introduces randomness to the whole system and change interference pattern leading to the localization effect. Whereas, decoherence plays the role of transmitting quantum walks to classical random walks.

关键词: quantum walk, disorder, decoherence

Abstract: This article aims to provide a review on quantum walks. Starting form a basic idea of discrete-time quantum walks, we will review the impact of disorder and decoherence on the properties of quantum walks. The evolution of the standard quantum walks is deterministic and disorder introduces randomness to the whole system and change interference pattern leading to the localization effect. Whereas, decoherence plays the role of transmitting quantum walks to classical random walks.

Key words: quantum walk, disorder, decoherence

中图分类号:  (Quantum algorithms, protocols, and simulations)

  • 03.67.Ac
42.50.Pq (Cavity quantum electrodynamics; micromasers) 74.50.+r (Tunneling phenomena; Josephson effects)