粒子数差 meaning in Chinese
population difference
Examples
- In chapter 5 , we make numerical calculation , then analyze the properties of the population distribution , the gain , the coherence term and population difference , and validate the transient light amplification mechanism of this system
第五章我们根据数值计算结果分析了粒子数分布、增益、相干项和粒子数差的瞬态演化过程，验证了系统产生增益的机制。 - In chapter 4 , we study nonlinear theory of the open v - type system with two - color incoherent pump . in this chapter , we discuss the conditions for the onset of lwi and the stability of the system in the limit of strong driving field , and the effect of incoherent pump rate rt on the gain , dispersion and population differences . we also discuss the effect of nonlinearities and the effect of pumping rate threshold of the pumping field
接着第四章讨论双色非相干泵浦系统的非线性理论，分析了强驱动场情况下的lwi产生的条件和稳定性、非相干泵浦速率r ~ 1对增益、色散和粒子数差的影响；讨论了该系统的非线性效应和非线性对非相干泵浦速率r ~ 1与r阈值关系的影响。 - In section one , we analyze the mechanism of lwi gain , and study the effects of the rabi frequency q of the driving field , the injection rates ratio rb / r ~ , the exit rate r0 , the decay rates ~ and rab between atomic levels , as well as 3 incoherent pump rate r on the gain without inversion , dispersion and population difference of the system . in section two , we discuss the effects of the detuning of the driving field and the probe field on the gain
在第一节中分析了无粒子数反转激光增益产生的机制、研究了驱动场的rabi频率、粒子注入速率比值r _ b / r _ c 、粒子退出速率r _ o 、能级间的自发衰减速率r _ ( c - b ) 、 r _ ( a - b )和非相干泵浦速率r对增益、色散和粒子数差的影响；第二节讨论了驱动场和探测场的失谐对无粒子数反转激光增益的影响。 - In this paper , we study inversionless lasing of frequency up - conversion in an open v - type system with incoherent pump . making theoretical analysis and numerical calculation by density - matrix equations of motion , we derive the conditions for the onset of lwi and discuss the effects of the parameters of the system , the detuning of driving field and probe field on the gain , and discuss nonlinear effect in the frequency up - conversion regime . we also give stability and transient analysis
本论文研究了具有非相干泵浦的开放v型系统频率上转换无粒子数反转激光，利用密度矩阵运动方程，通过理论分析和数值计算，得出该系统产生无粒子数反转激光的条件，讨论系统各参数的变化和驱动场与探测场的失谐对激光增益、色散和粒子数差的影响，还讨论了频率上转换区域的非线性效应，分析了增益的稳定性及系统的瞬态演化过程。 - On the basis of single mode superposition states , the squeezing and quantum statistical properties in the two - mode superposition states have been studied . the influences of the photon number , photon number difference , coefficients in the states and their relative phase on these non - classical properties have also been discussed . we have compared the results in the two - mode superposition states with those in the single - mode case
在单模光子数叠加态的研究基础上，研究了双模光子数叠加态的压缩性质和量子统计性质，讨论了叠加态中粒子数、粒子数差、叠加态系数及叠加相位差对压缩性质及量子统计性质的影响，并将其结果与单模叠加态进行了比较。