布居数 meaning in English
population
Examples
- Laser - induced population changes of 5p and 5d levels in rubidium vapor
态的布居数变化 - Finally we focus our attention on studying the emission spectrum of two atoms driven by a single - mode field in an ideal cavity . we showed that the atomic emission spectrum is insensitive to the phase of field for the two atoms initially in the coherent superposition state tf / = v2 / 2 ( j + , - ) h ? + } ) , when the two atoms is initially prepared in ( fs * } = cos ( 0 / 2 ] + , + ) + sm ( 0 / 2 ) ei ' p - , - ) , the atomic emission spectrum is associated with not only the field photon - number distribution and the atomic populations , but also the phases of the field and the atomic dipole
接着考察了好腔中由单模量子场驱动的双原子发射谱，结果表明初态为的双原子发射谱与驱动场的相位无关；而初态为的双原子发射谱不仅与光场的光子数分布以及原子的布居数有关，而且依赖于光场的相位以及原子偶极矩的相位，并且在适当的条件下，压缩真空场可将双原子俘获在相干叠加态。 - The analytical solutions of the gain , dispersion and population difference in the steady state of an open ladder lasing without inversion ( lwi ) system are at first given when the phase fluctuation of the driving field is considered . then the effects of the driving field phase fluctuation on the gain , dispersion and population difference are analyzed by the numerical results from the analytical solutions . our research shows that the phase fluctuation of the driving field will results in a finite line width ; with the line width increasing , the gain decreases monotonously , however , variation of the dispersion isn ? t monotonous , it has a maximum value when the line width takes some value ; the line width varying can ? t lead to change lasing from without to with population inversion
给出了有驱动场位相涨落的开放的梯型无粒子数反转激光( lwi )系统增益、色散和布居数差的定态解析解,进而用得到的数值计算结果分析了驱动场位相涨落对增益、色散和布居数差的影响.研究结果表明,驱动场位相涨落将导致有限线宽;随着线宽的增加,系统增益单调地减小,但系统色散的变化并不是单调的,当线宽取某个值时,色散有极大值;线宽的变化不能导致无反转激光向反转激光的转变 - The expressions of average value and variance of the phase difference and sum components are presented . we verified that under an appropriate condition the interference between the different transition processes makes counter balance , which induces the atom - field coupling system to be decoupled . the atomic population coherent trapping will take place
模的相位保持随机分布，给出了光场两个模相位差以及相位和的平均值与方差表达式，揭示了在适当的条件下，由于不同跃迁通道间的量于干涉效应，光场与原子退耦合，系统呈现原子布居数的相干俘获现象。 - Spontaneous emission can be totally suppressed or strongly enhanced depending on the relative position of the resonant frequency from the edge of the photonic band gap and the photonic mode density . several novel phenomena can be obtained . the spontaneous emission displays an oscillatory behavior , classical light localization , photon - atom bound state , nonzero steady - state population and anomalously large vacuum rabi splitting . and localized mode associated with a defect site in an otherwise perfect photonic crystals , acts as a high - q micro - cavity
通过原子上能级与光子频率带隙边缘的相对位置或者光子态密度，可以抑制或增强原子的自发辐射。分析并得到了一些奇异的现象，如自发辐射的谐振子行为、光的局域、单光子?原子局域态、上能级中存在非零稳态原子布居数、类似于真空中的拉比频率分裂等。