Single-shot realization of nonadiabatic holonomic quantum gates in decoherence-free subspaces

P. Z. Zhao, G. F. Xu, Q. M. Ding, Erik Sjöqvist, and D. M. Tong
Phys. Rev. A 95, 062310 – Published 6 June 2017

Abstract

Nonadiabatic holonomic quantum computation in decoherence-free subspaces has attracted increasing attention recently, as it allows for high-speed implementation and combines both the robustness of holonomic gates and the coherence stabilization of decoherence-free subspaces. Since the first protocol of nonadiabatic holonomic quantum computation in decoherence-free subspaces, a number of schemes for its physical implementation have been put forward. However, all previous schemes require two noncommuting gates to realize an arbitrary one-qubit gate, which doubles the exposure time of gates to error sources as well as the resource expenditure. In this paper, we propose an alternative protocol for nonadiabatic holonomic quantum computation in decoherence-free subspaces, in which an arbitrary one-qubit gate in decoherence-free subspaces is realized by a single-shot implementation. The present protocol not only maintains the merits of the original protocol but also avoids the extra work of combining two gates to implement an arbitrary one-qubit gate and thereby reduces the exposure time to various error sources.

  • Received 27 February 2017

DOI:https://doi.org/10.1103/PhysRevA.95.062310

©2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Quantum Information, Science & Technology

Authors & Affiliations

P. Z. Zhao1, G. F. Xu1,2,*, Q. M. Ding1, Erik Sjöqvist2,†, and D. M. Tong1,3,‡

  • 1Department of Physics, Shandong University, Jinan 250100, China
  • 2Department of Physics and Astronomy, Uppsala University, Box 516, Se-751 20 Uppsala, Sweden
  • 3Department of Physics, Dalian Maritime University, Dalian 116026, China

  • *sduxgf@163.com
  • erik.sjoqvist@physics.uu.se
  • tdm@sdu.edu.cn

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Issue

Vol. 95, Iss. 6 — June 2017

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