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Chin. Phys. B, 2019, Vol. 28(6): 060304    DOI: 10.1088/1674-1056/28/6/060304
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Entropy squeezing for three-level atom interacting with a single-mode field

Fei-Fan Liu(刘非凡), Mao-Fa Fang(方卯发), Xiong Xu(许雄)
Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha 410081, China

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.

Keywords:  variance squeezing      entropy squeezing      three-level atom  
Received:  02 January 2019      Revised:  27 March 2019      Accepted manuscript online: 
PACS:  03.67.-a (Quantum information)  
  03.65.Yz (Decoherence; open systems; quantum statistical methods)  

Project supported by the National Natural Science Foundation of China (Grant No. 11374096).

Corresponding Authors:  Mao-Fa Fang     E-mail:

Cite this article: 

Fei-Fan Liu(刘非凡), Mao-Fa Fang(方卯发), Xiong Xu(许雄) Entropy squeezing for three-level atom interacting with a single-mode field 2019 Chin. Phys. B 28 060304

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