中国物理B ›› 2007, Vol. 16 ›› Issue (2): 420-428.doi: 10.1088/1009-1963/16/2/023
周清平1, 周并举2, 刘明伟2, 刘小娟3
Zhou Bing-Ju(周并举)a), Liu Xiao-Juan(刘小娟)a)b)†, Zhou Qing-Ping(周清平)b), and Liu Ming-Wei(刘明伟)a)
摘要: Based on the quantum information theory, we have investigated the entropy squeezing of a moving two-level atom interacting with the coherent field via the quantum mechanical channel of the two-photon process. The results are compared with those of atomic squeezing based on the Heisenberg uncertainty relation. The influences of the atomic motion and field-mode structure parameter on the atomic entropy squeezing and on the control of noise of the quantum mechanical channel via the two-photon process are examined. Our results show that the squeezed period, duration of optimal entropy squeezing of a two-level atom and the noise of the quantum mechanical channel can be controlled by appropriately choosing the atomic motion and the field-mode structure parameter, respectively. The quantum mechanical channel of two-photon process is an ideal channel for quantum information (atomic quantum state) transmission. Quantum information entropy is a remarkably accurate measure of the atomic squeezing.
中图分类号: (Quantum state engineering and measurements)