期刊
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
卷 59, 期 4, 页码 -出版社
SCIENCE PRESS
DOI: 10.1007/s11433-016-5791-y
关键词
tight-binding model; quantum state transfer; adiabatic passage
资金
- National Natural Science Foundation of China [11422437, 11174027, 11105086, 11121403]
- National Basic Research Program of China [2012CB922104, 2014CB921403]
Quantum state transfer (QST) is an important task in quantum information processing. In this study, we describe two approaches for the high-fidelity transfer of a quantum state between two opposite quantum dots attached to a multi-channel quantum network. First, we demonstrate that a high-efficiency QST can be achieved with the coherent time evolution of a quantum system without any external control. Second, we present an approach that uses an alternative mechanism for a high-fidelity QST. By adiabatically varying tunnel couplings, it is possible to implement the complete transmission of a quantum state based on this quantum mechanical mechanism.
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