Quantum non-demolition measurement of nonlocal variables and its application in quantum authentication |
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| Institution: | 1. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, China;2. Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China;3. Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;4. College of Marine Geosciences, Key Laboratory of Submarine Science and Prospecting Techniques, Ministry of Education, Ocean University of China, Qingdao 266100, China |
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| Abstract: | Quantum non-demolition (QND) variables are generalized to the nonlocal ones by proposing QND measurement networks of Bell states and multi-partite GHZ states, which means that we can generate and measure them without any destruction. One of its prospective applications in the quantum authentication (QA) system of the quantum security automatic Teller machine (QSATM) which is much more reliable than the classical ones is also presented. |
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