Entropy, energy and negativity in Fermi-resonance coupled states of substituted methanes

	Entropy, energy and negativity in Fermi-resonance coupled states of substituted methanes
	Hou, XW; Wan, MF; Ma ZQ(马中骐); Ma, ZQ
刊名	JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
	2010
卷号	43 期号:20 页码:205301
通讯作者	[Hou, Xi-Wen] Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China ; [Wan, Ming-Fang] Wuhan Univ Technol, Sch Nat Sci, Wuhan 430079, Peoples R China ; [Ma, Zhong-Qi] Inst High Energy Phys, Beijing 100049, Peoples R China
英文摘要	Several measures of entanglement have attracted considerable interest in the relationship of a measure of entanglement with other quantities. The dynamics of entropy, energy and negativity is studied for Fermi-resonance coupled vibrations in substituted methanes with three kinds of initial mixed states, which are the mixed density matrices of binomial states, thermal states and squeezed states on two vibrational modes, respectively. It is demonstrated that for mixed binomial states and mixed thermal states with small magnitudes the entropies of the stretch and the bend are anti-correlated in the same oscillatory frequency, so do the energies for each kind of state with small magnitudes, whereas the entropies exhibit positive correlations with the corresponding energies. Furthermore, for small magnitudes quantum mutual entropy is positively correlated with the interacting energy. Analytic forms of entropies and energies are provided with initial conditions in which they are stationary, and the agreement between analytic and numerical simulations is satisfactory. The dynamical entanglement measured by negativity is examined for those states and conditions. It is shown that negativity displays a sudden death for mixed binomial states and mixed thermal states with small magnitudes, and the time-averaged negativity has the minimal value under the conditions of stationary entropies and energies. Moreover, negativity is positively correlated with the mutual entropy and the interacting energy just for mixed squeezed states with small magnitudes. Those are useful for molecular quantum information processing and dynamical entanglement.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary ; Physics, Mathematical
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000277343700014
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/241028]
专题	高能物理研究所_理论物理室
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Hou, XW,Wan, MF,Ma ZQ,et al. Entropy, energy and negativity in Fermi-resonance coupled states of substituted methanes[J]. JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL,2010,43(20):205301.
APA	Hou, XW,Wan, MF,马中骐,&Ma, ZQ.(2010).Entropy, energy and negativity in Fermi-resonance coupled states of substituted methanes.JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL,43(20),205301.
MLA	Hou, XW,et al."Entropy, energy and negativity in Fermi-resonance coupled states of substituted methanes".JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL 43.20(2010):205301.