期刊
QUANTUM INFORMATION PROCESSING
卷 12, 期 12, 页码 3835-3844出版社
SPRINGER
DOI: 10.1007/s11128-013-0638-1
关键词
Quantum information; Bidirectional controlled teleportation; Quantum secure direct communication; Five-qubit entangled state
资金
- National Natural Science Foundation of China [61265001]
- Natural Science Foundation of Jiangxi Province, China [20122BAB202005, 2010GZW0026, 20132BAB202008]
- Research Foundation of state key laboratory of advanced optical communication systems and networks, Shanghai Jiao Tong University, China [2011GZKF031104]
- Research Foundation of the Education Department of Jiangxi Province [GJJ13236, GJJ10404, GJJ13235]
A scheme is presented to implement bidirectional controlled quantum teleportation (QT) by using a five-qubit entangled state as a quantum channel, where Alice may transmit an arbitrary single qubit state called qubit A to Bob and at the same time, Bob may also transmit an arbitrary single qubit state called qubit B to Alice via the control of the supervisor Charlie. Based on our channel, we explicitly show how the bidirectional controlled QT protocol works. By using this bidirectional controlled teleportation, espcially, a bidirectional controlled quantum secure direct communication (QSDC) protocol, i.e., the so-called controlled quantum dialogue, is further investigated. Under the situation of insuring the security of the quantum channel, Alice (Bob) encodes a secret message directly on a sequence of qubit states and transmits them to Bob (Alice) supervised by Charlie. Especially, the qubits carrying the secret message do not need to be transmitted in quantum channel. At last, we show this QSDC scheme may be determinate and secure.
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