Fast and noise-resistant implementation of quantum phase gates and creation of quantum entangled states

Ye-Hong Chen, Yan Xia, Qing-Qin Chen, and Jie Song
Phys. Rev. A 91, 012325 – Published 20 January 2015

Abstract

The “Lewis-Riesenfeld phases” which play a crucial role in constructing shortcuts to adiabaticity may be a resource for the implementation of quantum phase gates. By combining “Lewis-Riesenfeld invariants” with “quantum Zeno dynamics,” we propose an effective scheme of rapidly implementing π phase gates via constructing shortcuts to adiabatic passage in a two-distant-atom-cavity system. The influence of various decoherence processes such as spontaneous emission and photon loss on the fidelity is discussed. It is noted that this scheme is insensitive to both error sources. Additionally, a creation of N-atom cluster states is put forward as a typical example of the applications of the fast and noise-resistant phase gates. The study results show that the shortcuts idea is not only applicable in other logic gates with different systems, but also propagable for many quantum information tasks.

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  • Received 30 October 2014

DOI:https://doi.org/10.1103/PhysRevA.91.012325

©2015 American Physical Society

Authors & Affiliations

Ye-Hong Chen1, Yan Xia1,*, Qing-Qin Chen2, and Jie Song3

  • 1Department of Physics, Fuzhou University, Fuzhou 350002, China
  • 2Zhicheng College, Fuzhou University, Fuzhou 350002, China
  • 3Department of Physics, Harbin Institute of Technology, Harbin 150001, China

  • *xia-208@163.com

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Vol. 91, Iss. 1 — January 2015

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