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Quantum Information Processing

Secure simultaneous dense coding using -type entangled state

  • 01-10-2018
Published in:
Authors
Xue Yang
Ming-qiang Bai
Zhi-cui Zuo
Zhi-wen Mo
Published in
Quantum Information Processing | Issue 10/2018

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Abstract

A violation of a Bell inequality can formally be expressed as a witness for quantum nonlocality. A new four-qubit Bell inequality is optimally violated by \(\chi \)-type entangled state, but not by four-qubit GHZ, W and cluster state. Hence, \(\chi \)-type entangled state is a good candidate to implement simultaneous dense coding. In this paper, we propose a simultaneous dense coding protocol with genuine four-particle entangled state, \(\chi \)-type entangled state, in which two receivers can simultaneously obtain their respective classical information sent by a sender. The double controlled-NOT operator, which is used as the locking operator, play a crucial role in our protocol. The security of simultaneous dense coding is analyzed against the intercept-resend attack. The preparation of \(\chi \)-type entangled state has been studied in various physics systems, and it has been experimentally generated with nearly deterministic scheme and high generation rate. Thus, our protocol is feasible with the current experimental technology.

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previous article Multi-party quantum private comparison of size relation with d-level single-particle states
next article State transfer with quantum side information
Title
Secure simultaneous dense coding using -type entangled state
Authors
Xue Yang
Ming-qiang Bai
Zhi-cui Zuo
Zhi-wen Mo
Publication date
01-10-2018
Publisher
Springer US
Published in
Quantum Information Processing / Issue 10/2018
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-018-2022-7
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