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Typical universal entanglers

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Abstract

A universal entangler is a very powerful fault-tolerant entangling device for generating quantum entanglements from any joint states. Our paper aims to address the construction of universal entanglers. We prove that universal entanglers may be obtained from random unitary gates according to the Harr measure. The success probability is close to 1 for large system spaces. This result represents the typical density of entanglement subspaces in large state spaces. It also partially solves an open problem of universal bipartite entanglers and is explained by some experiment simulations.

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Authors and Affiliations

  1. College of mathematical sciences, Dezhou University, Dezhou, 253023, China

    Feng Wang

  2. Information Security and National Computing Grid Laboratory, Southwest Jiaotong University, Chengdu, 610031, China

    MingXing Luo

  3. State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing, 100093, China

    MingXing Luo

  4. Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    XiuBo Chen & YiXian Yang

  5. School of Electronic Engineering, Dublin City University, Dublin 9, Ireland

    XiaoJun Wang

Authors
  1. Feng Wang
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  2. MingXing Luo
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  3. XiuBo Chen
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  4. YiXian Yang
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  5. XiaoJun Wang
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Correspondence to MingXing Luo.

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Wang, F., Luo, M., Chen, X. et al. Typical universal entanglers. Sci. China Phys. Mech. Astron. 57, 1913–1917 (2014). https://doi.org/10.1007/s11433-014-5524-z

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  • DOI: https://doi.org/10.1007/s11433-014-5524-z

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