1. Introduction In quantum optics, optical frequency conversion is a typical nonlinear process and is worth studying, for example, a second harmonic frequency generation will generate a squeezed state.[1＇2l In this ...1. Introduction In quantum optics, optical frequency conversion is a typical nonlinear process and is worth studying, for example, a second harmonic frequency generation will generate a squeezed state.[1＇2l In this work, we tackle the evolution of an initial coherent state in a Raman dispersion process which is also a nonlinear process. The process involves the inelastic scattering of a pho- ton when it is incident on a molecule. The photon loses some of its energy to the molecule or gains some from it, and so leaves the molecule with a lower or a higher frequency. The lower frequency components of the scattered radiation are called the Stokes lines and the higher frequency components are called the anti- Stokes lines. The Hamiltonian governing its dynamics is[3]展开更多
基于煤矿瓦斯(CH_4∶C_2H_6∶N_2=67.5∶22.5∶10)水合物相平衡曲线开展四种驱动力ΔP水合动力学实验,利用可见显微Raman光谱仪获取水合物生长过程光谱图,根据水合物相中C_2H_6 C—C键伸缩振动特征峰Raman位移确定了4组实验中水合物为s...基于煤矿瓦斯(CH_4∶C_2H_6∶N_2=67.5∶22.5∶10)水合物相平衡曲线开展四种驱动力ΔP水合动力学实验,利用可见显微Raman光谱仪获取水合物生长过程光谱图,根据水合物相中C_2H_6 C—C键伸缩振动特征峰Raman位移确定了4组实验中水合物为sⅡ结构。基于van der Waals与Platteeuw模型获取瓦斯水合物生成过程中水合物相气体组分及水合指数变化规律。研究表明:驱动力的大小影响水合物的稳定性,随着驱动力的增加,CH_4相比C_2H_6逐渐占据更多的孔穴结构,CH_4在水合物相内比例增加,水合物稳定性越强;瓦斯中N_2,CH_4和C_2H_6进入水合物孔穴优先级可以通过分子与水合物孔穴的直径比进行确定,分析认为在sⅡ水合物结构中小孔穴CH_4优先级最高,大孔穴C_2H_6最高;基于瓦斯水合物稳定性,对水合物生长过程客体分子的物质传递规律进行描述,为瓦斯水合物的微观生长提供理论基础。展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos.10775097 and 10475056)
文摘1. Introduction In quantum optics, optical frequency conversion is a typical nonlinear process and is worth studying, for example, a second harmonic frequency generation will generate a squeezed state.[1＇2l In this work, we tackle the evolution of an initial coherent state in a Raman dispersion process which is also a nonlinear process. The process involves the inelastic scattering of a pho- ton when it is incident on a molecule. The photon loses some of its energy to the molecule or gains some from it, and so leaves the molecule with a lower or a higher frequency. The lower frequency components of the scattered radiation are called the Stokes lines and the higher frequency components are called the anti- Stokes lines. The Hamiltonian governing its dynamics is[3]
文摘基于煤矿瓦斯(CH_4∶C_2H_6∶N_2=67.5∶22.5∶10)水合物相平衡曲线开展四种驱动力ΔP水合动力学实验,利用可见显微Raman光谱仪获取水合物生长过程光谱图,根据水合物相中C_2H_6 C—C键伸缩振动特征峰Raman位移确定了4组实验中水合物为sⅡ结构。基于van der Waals与Platteeuw模型获取瓦斯水合物生成过程中水合物相气体组分及水合指数变化规律。研究表明:驱动力的大小影响水合物的稳定性,随着驱动力的增加,CH_4相比C_2H_6逐渐占据更多的孔穴结构,CH_4在水合物相内比例增加,水合物稳定性越强;瓦斯中N_2,CH_4和C_2H_6进入水合物孔穴优先级可以通过分子与水合物孔穴的直径比进行确定,分析认为在sⅡ水合物结构中小孔穴CH_4优先级最高,大孔穴C_2H_6最高;基于瓦斯水合物稳定性,对水合物生长过程客体分子的物质传递规律进行描述,为瓦斯水合物的微观生长提供理论基础。
