Quantum Key Distribution Protocol Based on GHZ Like State and Bell State

Kun-Fei Yu, Chun‐Wei Yang, Ci-Hong Liao +1 more

Xiyuan Ma, Chaonan Wang, Zexi Li +1 more

Abdelmajid Meslouhi, Y. Hassouni

Kongni Zhu, Nanrun Zhou, Yun-Qian Wang +1 more

Zhaoxu Ji, Peiru Fan, Huanguo Zhang

We introduce a class of multi-particle Greenberger-Horne-Zeilinger (GHZ) states, and study entanglement swapping between two qubit systems for Bell states and for the class of GHZ states, respectively. We generalize the bi-system entanglement swapping of Bell states and multi-particle GHZ states to any number of qubit systems. We further study the entanglement swapping schemes between any number of Bell states and between any number of the introduced GHZ states in a detailed way, and propose the schemes that can generate two identical GHZ states. We illustrate the applications of such schemes in quantum information processing by proposing quantum protocols for quantum key distribution, quantum secret sharing and quantum private comparison.

David Castañeda Valle, Luis Fernando Quezada, Shi‐Hai Dong

Abstract In this work, a one‐sided measurement‐device‐independent quantum key distribution protocol that uses Bell and Greenberger–Horne–Zeilinger (GHZ) states is proposed. The protocol considers three parties: Alice and Bob, who will share the key at the end of the protocol; and Charlie, who plays the role of facilitating the key distribution without having access to the key itself. Alice and Charlie are trusted users, while Bob is uncharacterized. The protocol is asymmetrical, meaning that Alice sends one qubit while Bob sends two; this allows Bob to identify himself via a previously assigned ID; if this authentication fails, the key distribution also will.