%A Fei-Fan Liu(刘非凡), Mao-Fa Fang(方卯发), Xiong Xu(许雄) %T Entropy squeezing for three-level atom interacting with a single-mode field %0 Journal Article %D 2019 %J Chin. Phys. B %R 10.1088/1674-1056/28/6/060304 %P 60304-060304 %V 28 %N 6 %U {https://cpb.iphy.ac.cn/CN/abstract/article_121695.shtml} %8 2019-06-05 %X

The entropy squeezing for a three-level atom interacting with a single-model field is studied. A general definition of entropy squeezing for three-level atom is given according to entropic uncertainty relation of three-level system, and the calculation formalism of entropy is derived for a cascade three-level atom. By using numerical calculation, the entropy squeezing properties of a cascade three-level atom are examined. Our results show that, three-level atom can generate obvious entropy squeezing effect via choosing appropriate superposition state of three-level atom. Our results are meaningful for preparing three-level system information resources with ultra-low quantum noise.