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The atomic squeezing effect in the dissipative environment is investigated by means of the quantum theory of damping-density operator approach and numerical calculations. The effects on the atomic dipole squeezing effect produced by the atomic initial state and mean photon number of the thermal reservoir are discussed. The results show that the atomic dipole squeezing declines asymptotically to zero, and doesn’t disappear in finite time if the population rate in the excited state is higher than the ground state in the atomic initial state in the vacuum reservoir. However, the squeezing effect always disappears in the thermal reservoir, irrespective of the atomic initial state. With increase of mean photon of the thermal reservoir, the squeezing effect disappears faster.
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Keywords:
- dissipative environments /
- vacuum reservoir /
- thermal reservoir /
- dipole squeezing
[1] Walls D F 1983 Nature 306 141
[2] Yuen H P 1976 Phys. Rev. A 13 2226
[3] Peng J S, Li G X 1993 Phys. Rev. A 47 3167
[4] Walls D F, Zoller P 1981 Phys. Rev. Lett. 47 709
[5] Wodkiewicz K, Knight P L, Buckle S J, Barnett S M 1987 Phys. Rev. A 35 2567
[6] Fan A P, Wang Z W, Sun N C 1995 Acta Phys. Sin. 44 536 (in Chinese) [范安辅、王志伟、孙年春 1995 物理学报 44 536]
[7] Gu Q 1988 Acta Phys. Sin. 37 751 (in Chinese) [顾 樵 1988 物理学报 37 751]
[8] Zhou P, Peng J S 1989 Acta Phys. Sin. 38 2044 (in Chinese) [周 鹏、彭金生 1989物理学报 38 2044]
[9] Pan C N, Fang M F, Zheng X J, Hu Y H 2007 Chin. Phys. 16 1549
[10] Fang M F, Liu X 2001 Chin. Phys. 10 720
[11] Wu Y, Yang X X 1997 Phys. Rev. Lett. 78 3086
[12] Wu Y 2001 Phys. Rev. A 63 052303
[13] Chen X, Xia Y J 2010 Acta Phys. Sin. 59 0080 (in Chinese)[陈 星、夏云杰 2010 物理学报 59 0080]
[14] Zhao J G, Sun C Y, Meng X G, Su J 2009 Acta Phys. Sin. 58 6985 (in Chinese)[赵建刚、孙长勇、孟祥国、苏 杰 2009 物理学报 58 6985]
[15] Xu X X, Hu L Y, Fan H Y 2009 Chin. Phys. B 18 5139
[16] Lin J C, Zheng X H, Cao Z L 2007 Acta Phys. Sin. 56 0837 (in Chinese) [林继成、郑小虎、曹卓良 2007 物理学报 56 0837]
[17] Peng J S, Li G X 1996 Introduction of Modern Quantum Optics (Beijing: Science Press) (in Chinese) [彭金生、李高翔 1996 近代量子光学导论(北京:科学出版社)]
[18] Scully M O, Zubairy M S 1997 Quantum Optics (Cambridge: Cambridge University Press)
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[1] Walls D F 1983 Nature 306 141
[2] Yuen H P 1976 Phys. Rev. A 13 2226
[3] Peng J S, Li G X 1993 Phys. Rev. A 47 3167
[4] Walls D F, Zoller P 1981 Phys. Rev. Lett. 47 709
[5] Wodkiewicz K, Knight P L, Buckle S J, Barnett S M 1987 Phys. Rev. A 35 2567
[6] Fan A P, Wang Z W, Sun N C 1995 Acta Phys. Sin. 44 536 (in Chinese) [范安辅、王志伟、孙年春 1995 物理学报 44 536]
[7] Gu Q 1988 Acta Phys. Sin. 37 751 (in Chinese) [顾 樵 1988 物理学报 37 751]
[8] Zhou P, Peng J S 1989 Acta Phys. Sin. 38 2044 (in Chinese) [周 鹏、彭金生 1989物理学报 38 2044]
[9] Pan C N, Fang M F, Zheng X J, Hu Y H 2007 Chin. Phys. 16 1549
[10] Fang M F, Liu X 2001 Chin. Phys. 10 720
[11] Wu Y, Yang X X 1997 Phys. Rev. Lett. 78 3086
[12] Wu Y 2001 Phys. Rev. A 63 052303
[13] Chen X, Xia Y J 2010 Acta Phys. Sin. 59 0080 (in Chinese)[陈 星、夏云杰 2010 物理学报 59 0080]
[14] Zhao J G, Sun C Y, Meng X G, Su J 2009 Acta Phys. Sin. 58 6985 (in Chinese)[赵建刚、孙长勇、孟祥国、苏 杰 2009 物理学报 58 6985]
[15] Xu X X, Hu L Y, Fan H Y 2009 Chin. Phys. B 18 5139
[16] Lin J C, Zheng X H, Cao Z L 2007 Acta Phys. Sin. 56 0837 (in Chinese) [林继成、郑小虎、曹卓良 2007 物理学报 56 0837]
[17] Peng J S, Li G X 1996 Introduction of Modern Quantum Optics (Beijing: Science Press) (in Chinese) [彭金生、李高翔 1996 近代量子光学导论(北京:科学出版社)]
[18] Scully M O, Zubairy M S 1997 Quantum Optics (Cambridge: Cambridge University Press)
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