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Feasible logic Bell-state analysis with linear optics.

Lan Zhou1,2, Yu-Bo Sheng2

  • 1College of Mathematics &Physics, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China.

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|February 16, 2016
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Summary
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We present a feasible logic Bell-state analysis protocol using robust concatenated Greenberger-Horne-Zeilinger (C-GHZ) states. This method utilizes standard optical components for efficient analysis in quantum computation.

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Area of Science:

  • Quantum Information Science
  • Linear-Optical Quantum Computation

Background:

  • Concatenated Greenberger-Horne-Zeilinger (C-GHZ) states offer robustness for quantum information processing.
  • Efficient Bell-state analysis is crucial for the development of quantum computation.

Purpose of the Study:

  • To develop a feasible protocol for logic Bell-state analysis.
  • To utilize C-GHZ states for robust quantum information processing.

Main Methods:

  • Employing logic entanglement in the form of C-GHZ states.
  • Utilizing polarization beam splitters and half-wave plates for analysis.
  • Generalizing the protocol for arbitrary C-GHZ states and N-logic-qubit states.

Main Results:

  • Convenient identification of two logic Bell states.
  • Demonstration of protocol generalizability to arbitrary C-GHZ states.
  • Distinguishing two N-logic-qubit C-GHZ states.

Conclusions:

  • The proposed logic Bell-state analysis protocol is feasible with current technology.
  • This protocol is essential for linear-optical quantum computation protocols relying on entangled states.
  • The robustness of C-GHZ states enhances the reliability of quantum computation.