Quantum information technology largely relies on a precious and fragile resource, call quantum entanglement, which exhibits a highly nontrivial manifestation of the coherent superposition of states of composite quantum systems. In this article, we discuss the correlation between the quantum entanglement measured by the von Neumann entropy and atomic quantum Fisher information by taking account the case of moving three-level atom. Our results show that there is a monotonic relation between the atomic quantum Fisher information and entanglement in the case of non-moving atom. On the other hand, we find that the atomic quantum Fisher information and entanglement exhibit an opposite changement behavior during the time evolution in the presence of atomic motion.
Quantum Information Processing – Springer Journals
Published: Aug 29, 2013
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