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Entanglement Dynamics in Typical Local- and Normal-Mode Molecules |
| HOU Xi-Wen1;WAN Ming-Fang2;MA Zhong-Qi3 |
| 1Department of Physics, Huazhong Normal University, Wuhan 4300792School of Natural Science, Wuhan University of Technology, Wuhan 430079 3Institute of High Energy Physics, Chinese Academy of Sciences, PO Box 918(4), Beijing 100049 |
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| Cite this article: |
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HOU Xi-Wen, WAN Ming-Fang, MA Zhong-Qi 2007 Chin. Phys. Lett. 24 1549-1552 |
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Abstract The entanglement dynamics of two stretching vibrations in theoretically typical local- and normal-mode molecules and realistic molecules H2O and SO2 in an algebraic model is studied in terms of the reduced-density linear entropy with
initial entangled states taken to be two-mode squeezed vacuum states. It is shown that the behaviour of the entropy in theoretically typical molecules appears to be more regular than that in realistic ones, and that the entropy becomes irregular as the amplitude of two-mode squeezed vacuum states increases. For initial states with a small amplitude, it is demonstrated that the
periodicity and the ``classical'' beat phenomenon of the entropy occur with the beat in theoretically typical molecules being more regular than that in realistic molecules H2O and SO2.
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| Keywords:
33.20.Tp
03.65.Ud
03.67.Mn
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Received: 21 December 2006
Published: 17 May 2007
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| PACS: |
33.20.Tp
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(Vibrational analysis)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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