Information Transfer and Entanglement Creation by Spin Chains: Effects of Noise and Asymmetry

• Totsuji Hiroo

• Chai Hong

• Totsuji Chieko

• Tsuruta Kenji

抄録

For the transfer of quantum information and the creation of entangled states, the application of tuned spin chains, systems of spins with the nearest-neighbor coupling tuned so as to give high efficiency, has been proposed and some examples of high performance have been given by several authors. In this article, the effect of deviations from tuned values and the effect of resultant asymmetry are investigated through numerical simulations and theoretical analyses. It is shown that there exists a system where the transfer efficiency is comparable with exactly tuned ones and, at the same time, robust to noises in the coupling constants. It is also shown that the effect of asymmetry on the efficiency of entanglement creation is of the second order when the asymmetry is small.

収録刊行物

• Memoirs of the Faculty of Engineering, Okayama University

  Memoirs of the Faculty of Engineering, Okayama University 43 22-26, 2009-01

  Faculty of Engineering, Okayama University

詳細情報

• CRID: 1390853649525363456
• NII論文ID: 120002308966
• NII書誌ID: AA12014085
• ISSN: 13496115
• DOI: 10.18926/17831
• Web Site: https://ousar.lib.okayama-u.ac.jp/17831
• 本文言語コード: en
• データソース種別:
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  • IRDB
  • CiNii Articles