ENTANGLEMENT SWAPPING AND QUANTUM COMMUNICATION IN CAVITY QED

2008 ◽  
Vol 06 (06) ◽  
pp. 1255-1262 ◽  
Author(s):  
CHUAN-JIA SHAN ◽  
JI-BING LIU ◽  
WEI-WEN CHENG ◽  
TANG-KUN LIU ◽  
YAN-XIA HUANG ◽  
...  
Keyword(s):  
Cavity Qed ◽  
Quantum Communication ◽  
Communication Protocol ◽  
Success Probability ◽  
Entanglement Swapping ◽  
Direct Communication

We study entanglement swapping and quantum communication in the context of cavity QED. We first present an entanglement swapping scheme in cavities where two atoms without interacting previously can be entangled with the success probability unity. Then, conditioned on a novel property of entanglement swapping, we propose a secure direct communication protocol, in which two legitimate users can communicate deterministically.

BIDIRECTIONAL QUANTUM SECURE DIRECT COMMUNICATION IN DRIVEN CAVITY QED

2009 ◽  
Vol 23 (27) ◽  
pp. 3225-3234 ◽  
Author(s):  
CHUAN-JIA SHAN ◽  
JI-BING LIU ◽  
WEI-WEN CHENG ◽  
TANG-KUN LIU ◽  
YAN-XIA HUANG ◽  
...  
Keyword(s):  
Cavity Qed ◽  
Thermal Field ◽  
Success Probability ◽  
Bell State ◽  
Quantum Secure Direct Communication ◽  
Entanglement Swapping ◽  
Direct Communication ◽  
Driven Cavity ◽  
Cavity Decay ◽  
Probability Of Success

A theoretical scheme of bidirectional quantum secure direct communication is proposed in the context of driven cavity QED. We first present an entanglement swapping scheme in cavities where two atoms without previous interaction can be entangled with a success probability of unity. Then, based on a novel property of entanglement swapping, we propose a bidirectional quantum secure direct communication protocol, in which two legitimate users can exchange their different secret messages simultaneously in a direct way. The probability of success in our scheme is 1.0. This scheme does not involve apparent (or direct) Bell-state measurements and is insensitive to the cavity decay and the thermal field.

Two Way Quantum Direct Communication Protocol Using Entanglement Swapping

2010 ◽  
Vol 56 (6) ◽  
pp. 1733-1737 ◽  
Author(s):  
Hyung Jin Yang ◽  
Chang Ho Hong ◽  
Jong In Lim ◽  
Ji In Kim
Keyword(s):  
Communication Protocol ◽  
Entanglement Swapping ◽  
Direct Communication ◽  
Quantum Direct Communication

Quantum Satellite Telecontrol System

2014 ◽  
Vol 898 ◽  
pp. 663-667
Author(s):  
Cheng Hong Zhou ◽  
Yi Liu ◽  
Wei Ping Qian
Keyword(s):  
Quantum Communication ◽  
Closed Loop ◽  
Communication Protocol ◽  
Quantum Secure Direct Communication ◽  
Comparison System ◽  
Direct Communication ◽  
Security And Reliability ◽  
Further Development

In this article, we first review the classical satellite telecontrol system, including space-ground closed loop comparison system, and analyse the insufficient from the perspectives of security and reliability. Subsequently the development of quantum communication is summarized, besides, the advantages of quantum communication used for satellite telecontrol is expounded. Finally we put forward a simplified quantum secure direct communication protocol for satellite telecontrol and discuss the quantum telecontrol system for further development.

QUANTUM DIRECT COMMUNICATION BASED ON QUANTUM SEARCH ALGORITHM

2010 ◽  
Vol 08 (03) ◽  
pp. 443-450 ◽  
Author(s):  
CHUAN WANG ◽  
LIANG HAO ◽  
SI YU SONG ◽  
GUI LU LONG
Keyword(s):  
Quantum Communication ◽  
Communication Protocol ◽  
Search Algorithm ◽  
Quantum Secure Direct Communication ◽  
Quantum Search ◽  
Quantum Search Algorithm ◽  
Direct Communication ◽  
Quantum Direct Communication ◽  
Direct Communications ◽  
Individual Attack

Quantum direct communications, including deterministic secure quantum communication and quantum secure direct communication protocol using two-qubit quantum search algorithm are proposed in this paper. Secret messages are encoded by two-qubit unitary operations and exchanged by the two communication parties directly. We discussed the security of the protocol under intercept-resend attack and individual attack. We found that the protocols are secure against eavesdropping attacks.

IMPLEMENTING ENTANGLEMENT SWAPPING WITH A THERMAL CAVITY

2007 ◽  
Vol 05 (06) ◽  
pp. 837-843 ◽  
Author(s):  
ZHI HE ◽  
CHAO-YUN LONG ◽  
SHUI-JIE QIN ◽  
GAO-FENG WEI
Keyword(s):  
Cavity Qed ◽  
Thermal Field ◽  
Success Probability ◽  
Entanglement Swapping ◽  
Cavity Decay

We proposed a scheme to implement the entanglement swapping based on cavity QED. Using this scheme, we can obtain the entanglement swapping with the success probability of 100% for a two atoms system and a three atoms system respectively, and the entanglement swapping is insensitive to both the cavity decay and thermal field.

Cryptanalysis and improvement of the robust quantum dialogue protocols based on the entanglement swapping between any two logical Bell states and the shared auxiliary logical Bell state

2019 ◽  
Vol 34 (29) ◽  
pp. 1950241 ◽  
Author(s):  
Zhihao Liu ◽  
Hanwu Chen
Keyword(s):  
Quantum Communication ◽  
Communication Protocol ◽  
Information Leakage ◽  
Bell State ◽  
Entanglement Swapping ◽  
Bell States ◽  
Quantum Dialogue ◽  
Collective Rotation ◽  
Collective Rotation Noise ◽  
Quantum Communication Protocol

As we know, it does not allow that a secure quantum communication protocol has the information leakage problem. Unfortunately, we find that there is the information leakage problem in the two quantum dialogue (QD) protocols which are respectively based on entanglement swapping between two logical Bell states under the collective-dephasing noise and the collective-rotation noise. To mend this loophole, they are masterly improved. It is proven that the improved QD protocols are without information leakage problem. Incidentally, they have some other obvious advantages compared to the previous ones.

Quantum direct communication with mutual authenticationQuantum direct communication with mutual authenticationQuantum direct communication with mutual authentication

2009 ◽  
Vol 9 (5&6) ◽  
pp. 376-394
Author(s):  
C.-A. Yen ◽  
S.-J. Horng ◽  
H.-S. Goan ◽  
T.-W. Kao ◽  
Y.-H. Chou
Keyword(s):  
Communication Network ◽  
Quantum Communication ◽  
Mutual Authentication ◽  
Entanglement Swapping ◽  
Direct Communication ◽  
Quantum Direct Communication ◽  
Communication Processes ◽  
Unitary Transformations ◽  
Quantum Protocol ◽  
Quantum Link

In this paper, we first point out that some recently proposed quantum direct communication (QDC) protocols with authentication are vulnerable under some specific attacks, and the secrete message will leak out to the authenticator who is introduced to authenticate users participating in the communication. We then propose a new protocol that is capable of achieving secure QDC with authentication as long as the authenticator would do the authentication job faithfully. Our quantum protocol introduces a mutual authentication procedure, uses the quantum Bell states, and applies unitary transformations in the authentication process. Then it exploits and utilizes the entanglement swapping and local unitary operations in the communication processes. Thus, after the authentication process, the client users are left alone to communicate with each other, and the authenticator has no access to the secrete message. In addition, our protocol does not require a direct quantum link between any two users, who want to communicate with each other. This may also be an appealing advantage in the implementation of a practical quantum communication network.

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