Quantum dialogue protocols immune to collective noise

  • Authors:
  • Chun-Wei Yang;Tzonelih Hwang

  • Affiliations:
  • Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan City, Taiwan, ROC 70101;Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan City, Taiwan, ROC 70101

  • Venue:
  • Quantum Information Processing
  • Year:
  • 2013

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Abstract

This work proposes two quantum dialogue protocols, each of which is robust against one of the following two kinds of collective noise: collective-dephasing noise and collective-rotation noise. Both quantum dialogue protocols are constructed from four-qubit DF states that consist of two Bell states. The receiver simply performs two Bell state measurements to obtain the secret message. Moreover, the proposed protocols are free from information leakage because some shared private quantum states are established in the new protocols to allow the legitimate users to exchange their secret messages securely.