High-fidelity state transfer over an unmodulated linear XY spin chain

C. Allen Bishop, Yong-Cheng Ou, Zhao-Ming Wang, and Mark S. Byrd
Phys. Rev. A 81, 042313 – Published 19 April 2010
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  • INTRODUCTION
  • UNITARY EVOLUTION OF A SPIN CHAIN: XY MO…
  • HIGH-FIDELITY TRANSFER OF A CLASS OF…
  • AVERAGE FIDELITY AND THE MAGNETIC FIELD
  • OPTIMAL STATE ENCODING
  • CONCLUSION
  • APPENDICES
    • References

    Abstract

    We provide a class of initial encodings that can be sent with a high fidelity over an unmodulated, linear, XY spin chain. As an example, an average fidelity of 96% can be obtained using an 11-spin encoding to transmit a state over a chain containing 10 000 spins. An analysis of the magnetic-field dependence is given, and conditions for field optimization are provided.

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    • Received 13 October 2009

    DOI:https://doi.org/10.1103/PhysRevA.81.042313

    ©2010 American Physical Society

    Authors & Affiliations

    C. Allen Bishop1,*, Yong-Cheng Ou1, Zhao-Ming Wang2, and Mark S. Byrd1

    • 1Physics Department, Southern Illinois University, Carbondale, Illinois 62901-4401, USA
    • 2Physics Department, Ocean University of China, Qingdao 266100, People's Republic of China

    • *abishop@www.physics.siu.edu

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    Vol. 81, Iss. 4 — April 2010

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