在Jaynes－Cummings模型中压缩真空初态场位相演化特性

应用Ｐｅｇｇ－Ｂａｒｎｅｔｔ位相理论，研究了Ｊａｙｎｅｓ－Ｃｕｍｍｉｎｇｓ模型（Ｊ－Ｃ模型）中压缩真空初态场位相演化特性，具体计算了弱压缩条件下，场的位相几率分布函数及位相涨落，给出了在极坐标中位相几率分布演化曲线，讨论了原子与场相互作用对场的位相性质的影响。     

在Jaynes—Cummings模型中压缩真空初态场位相演化特性

应用Ｐｅｇｇ－Ｂａｒｎｅｔｔ位相理论，研究了Ｊａｙｎｅｓ－Ｃｕｍｍｉｎｇｓ模型（Ｊ－Ｃ模型）中压缩真空初态场位相演化特性，具体计算了弱压缩条件下，场的位相几率分布函数及位相涨落，给出了在极坐标中位相几率分布演化曲线，讨论了原子与场相互作用对场的位相性质的影响。     

q变形光场与两能级原子相互作用中场的位相特性

用变形Ｐｅｇｇ－Ｂａｒｎｅｔｔ位相理论研究了在共振情况下变形Ｊａｙｎｅｓ－Ｃｕｍｍｉｎｇｓ（Ｊ－Ｃ）框或场的位相特性。讨论了ｑ变形参量对场位相统计和动力学性质 影响。     

双光子Jaynes—Cummings模型中的Schrodinger cat态

计算了双光子Ｊａｙｎｅｓ－Ｃｕｍｍｉｎｇｓ模型场熵的演化，结合光子数统计分布和位相分布论证了双光子Ｊａｙｎｅｓ－Ｃｕｍｍｉｎｇｓ模型在强场情况和某些特定时刻存在“Ｓｃｈｒｏｄｉｎｇｅｒ ｃａｔ”态的迭加态。     

附加克尔介质Jaynes－Cummings模型的场熵演化

研究了附加克尔（Ｋｅｒｒ）介质Ｊａｙｎｅｓ－Ｃｕｍｍｉｎｇｓ（Ｊ－Ｃ）模型场熵演化的动力学特性，讨论了克尔介质非线性相互作用以及失谐量对场熵演化的影响．     

附加克尔介质Jaynes—Cummings模型的场熵演化

研究了附加克尔（Ｋｅｒｒ）介质Ｊａｙｎｅｓ－Ｃｕｍｍｉｎｇｓ（Ｊ－Ｃ）模型场熵演化的动力学特性，讨论了克尔介质非线性相互作用以及失谐量对场熵演化的影响。     

非旋波近似下Jaynes—Cummings模型中的场熵演化

研究了非旋波近似下Ｊａｙｎｅｓ－Ｃｕｍｍｉｎｇｓ（Ｊ－Ｃ）模型中的场熵演化规律，并与旋波近似下的相应结果进行比较，讨论了虚光子过程对场熵演化的影响。     

非旋波近似下Jaynes-Cummings模型中的场熵演化

研究了非旋波近似下Ｊａｙｎｅｓ－Ｃｕｍｍｉｎｇｓ（Ｊ－Ｃ）模型中的场熵演化规律，并与旋波近似下的相应结果进行比较，讨论了虚光子过程对场熵演化的影响。     

Authors Index to Volume B5

ＡｕｔｈｏｒｓＩｎｄｅｘｔｏＶｏｌｕｍｅＢ５ＡＮＨｏｎｇｌｉｎ－－（６），５０１ＢＡＯＧｕｏｊＵｎ－－（ｌ），８ＢＡＯＪｉａｓｈａｎ－－（ｌ），４３ＣＡＩＢａｎｇｗｅｉ－－（４），３６３ＣＡＯａｃｉｎｇ－－（１），９４ＣＡＯＱｉｎｇ－－（５），４３９...     

SU(1,1)相干态光场的统计特性及其对原子动力学行为的影响

研究了Ｂａｒｇｍａｎ指标为ｋ＝１／４和ｋ＝３／４的两种ＳＵ（１，１）相干态光场的特性，证明了两种相干态具有不同的量子统计特性，并讨论了光场初始处于ＳＵ（１，１）相干态时，双光子Ｊａｙｎｅｓ－Ｃｕｍｍｉｎｇｓ（Ｊ－Ｃ）模型中，原子的动力学行为及粒子数反转随时间的演化，证明了与初始一般相干态光场不同，原子展现出特殊的周期振荡和脉冲行为。 关键词：     

压缩真空场与耦合双原子Raman相互作用过程中光场的相位演化特性

采用Pegg-Barnett相位理论，研究了压缩真空场与耦合双原子Raman相互作用过程中光场的相位演化特性.具体计算了场的相位概率分布函数及相位涨落，给出了在极坐标中概率分布变化曲线.讨论了原子与场相互作用、两原子间偶极-偶极相互作用以及原子初始状态对光场相位性质的影响. 关键词： 相位特性 压缩真空场 耦合双原子 Raman相互作用     

Zwitters: Particles between quantum and classical

We describe both quantum particles and classical particles in terms of a classical statistical ensemble, with a probability distribution in phase space. By use of a wave function in phase space both can be treated in the same quantum formalism. Quantum particles are characterized by a specific choice of observables and time evolution of the probability density. Then interference and tunneling are found within classical statistics. Zwitters are (effective) one-particle states for which the time evolution interpolates between quantum and classical particles. Experimental bounds on a small parameter can test quantum mechanics.     

Macroscopic Time Evolution and MaxEnt Inference for Closed Systems with Hamiltonian Dynamics

MaxEnt inference algorithm and information theory are relevant for the time evolution of macroscopic systems considered as problem of incomplete information. Two different MaxEnt approaches are introduced in this work, both applied to prediction of time evolution for closed Hamiltonian systems. The first one is based on Liouville equation for the conditional probability distribution, introduced as a strict microscopic constraint on time evolution in phase space. The conditional probability distribution is defined for the set of microstates associated with the set of phase space paths determined by solutions of Hamilton’s equations. The MaxEnt inference algorithm with Shannon’s concept of the conditional information entropy is then applied to prediction, consistently with this strict microscopic constraint on time evolution in phase space. The second approach is based on the same concepts, with a difference that Liouville equation for the conditional probability distribution is introduced as a macroscopic constraint given by a phase space average. We consider the incomplete nature of our information about microscopic dynamics in a rational way that is consistent with Jaynes’ formulation of predictive statistical mechanics, and the concept of macroscopic reproducibility for time dependent processes. Maximization of the conditional information entropy subject to this macroscopic constraint leads to a loss of correlation between the initial phase space paths and final microstates. Information entropy is the theoretic upper bound on the conditional information entropy, with the upper bound attained only in case of the complete loss of correlation. In this alternative approach to prediction of macroscopic time evolution, maximization of the conditional information entropy is equivalent to the loss of statistical correlation, and leads to corresponding loss of information. In accordance with the original idea of Jaynes, irreversibility appears as a consequence of gradual loss of information about possible microstates of the system.     

PHASE PROPERTIES OF THE RADIATION FIELDS IN RAMAN PROCESS

The general evolution of the interaction of two radiation fields with an effective two-level atom via the Raman-type transitions is presented. Using the Pegg-Barnett phase theory, the joint phase probability distribution of the two field modes, phase average values and phase fluctuations are studied in detail. Also, the effect of the presence of a field on the phase properties of the other mode is examined.     

含Kerr介质的Λ型三能级原子系统中光场的相位性质

研究了充满Kerr介质的高Q腔中与Λ型三能级原子非共振喇曼作用的单模腔场的相位演化特性,分析了光场频率与原子本征频率的单光子失谐量和Kerr介质对光场相位概率分布、相位扩散和相位频率漂移的影响.     

Evolution of Coherent Light in a Simple Polariton Model

We study the phase evolution behaviour of coherent light interacting with phonons initially in thermal equilibrium at temperature T in terms of phase distribution probability. It is shown that the phase not only shifts but also diffuses. The phase distribution broadens and narrows periodically with time. There is a threshold in the variation of the width of phase distribution as a function of coupling coefficient in the detuning case for fixed temperature. The phase diffusion changes rapidly with temperature for coupling coefficient above the threshold while it changes little with temperature for coupling coefficient below the threshold.     

Influence of Cavity Decay on Phase Distribution and Rabi Flopping in Cavity QED

The quantum mechanical phase distribution and the quantum oscillations of population are studied for a cavity field togetherwith a driven classical field. The atom is sent through the cavity and driven by a classical field. Also the time evolution of the system including decay is obtained. The graph showing the Rabi oscillations for this system is changed into a bit pattern from the system without decay. The phase probability function is also affected due to the presence of cavity decay.     

光场相位统计性质

根据Pegg-Barnett相位定义,计算了Fock态、相干态、压缩态、孪相干态、纠缠态等光场的相位概率分布函数,以及一些单模光场在介质中传播时的相位分布函数随时间的演化情况,并作了数值模拟。     

隧穿量子点分子模型与光场相互作用系统中光场的相位特性

应用Pegg-Barnett相位理论,研究了隧穿量子点分子模型与光场相互作用系统中光场的相位特性,着重分析了光场的相位概率分布及相位涨落,并讨论了平均光子数和失谐量以及时间对相位概率分布的影响．结果发现：光场相位概率分布在零附近的概率分布最大,且涨落最小,而其它范围内概率分布小且容易振荡,适当调节平均光子数和时间,能使相位概率分布由单峰结构向对称的三峰高斯分布转化,且能调节峰值的大小．