Experimental Implementation of Adiabatic Passage between Different Topological Orders

Xinhua Peng, Zhihuang Luo, Wenqiang Zheng, Supeng Kou, Dieter Suter, and Jiangfeng Du
Phys. Rev. Lett. 113, 080404 – Published 21 August 2014
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Abstract

Topological orders are exotic phases of matter existing in strongly correlated quantum systems, which are beyond the usual symmetry description and cannot be distinguished by local order parameters. Here we report an experimental quantum simulation of the Wen-plaquette spin model with different topological orders in a nuclear magnetic resonance system, and observe the adiabatic transition between two Z2 topological orders through a spin-polarized phase by measuring the nonlocal closed-string (Wilson loop) operator. Moreover, we also measure the entanglement properties of the topological orders. This work confirms the adiabatic method for preparing topologically ordered states and provides an experimental tool for further studies of complex quantum systems.

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  • Received 21 February 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.080404

© 2014 American Physical Society

Authors & Affiliations

Xinhua Peng1,2,*, Zhihuang Luo1, Wenqiang Zheng1, Supeng Kou3,†, Dieter Suter4, and Jiangfeng Du1,2,‡

  • 1Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
  • 2Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
  • 3Department of Physics, Beijing Normal University, Beijing 100875, China
  • 4Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund, Germany

  • *xhpeng@ustc.edu.cn
  • spkou@bnu.edu.cn
  • djf@ustc.edu.cn

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Issue

Vol. 113, Iss. 8 — 22 August 2014

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