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Chin. Phys. B, 2021, Vol. 30(1): 010303    DOI: 10.1088/1674-1056/abb304
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Entropy squeezing for a V-type three-level atom interacting with a single-mode field and passing through the amplitude damping channel with weak measurement

Cui-Yu Zhang(张翠玉) and Mao-Fa Fang(方卯发)
Synergetic Innovation Center for Quantum Effects and Applications, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of\vglue2pt Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha\/ 410081, China
Abstract  The entropy squeezing of a V-type three-level atom interacting with a single-mode field and passing through the amplitude damping channel is investigated in detail. Our results show that when coupled to the single-mode field, the atom in appropriate initial states can not only generate obvious entropy squeezing but also keep in the optimal squeezing state, while passing through the amplitude damping channel, the atom can generate entropy squeezing under the control of the weak measurement. Besides, it is proved again that as a measurement method for atomic squeezing, the entropy squeezing is precise and effective. Therefore our work is instructive for experiments in preparing three-level system information resource with ultra-low quantum noise.
Keywords:  entropy squeezing      V-type three-level atom      single-mode field      weak measurement  
Received:  24 June 2020      Revised:  13 August 2020      Accepted manuscript online:  27 August 2020
PACS:  03.67.-a (Quantum information)  
  03.65.Yz (Decoherence; open systems; quantum statistical methods)  
  42.50.-p (Quantum optics)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12064012 and 11374096).\vglue2pt
Corresponding Authors:  Corresponding author. E-mail:   

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Cui-Yu Zhang(张翠玉) and Mao-Fa Fang(方卯发) Entropy squeezing for a V-type three-level atom interacting with a single-mode field and passing through the amplitude damping channel with weak measurement 2021 Chin. Phys. B 30 010303

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