Boltzmann Equations with Quantum Effects (1):Long Time Behavior of Spatial Decay Solutions

IntroductionIn the absence of external force fields,the modifiedBoltzmann equations governing Bose- Einsteinparticles and Fermi- Dirac particles can be unifiedto the following form[13 ] ,f(x,v,t)t +v .xf(x,v,t) =Qα(f) (x,v,t) ,(x,v,t)∈ R3× R3× R+ ,　 (BQE)whereα is proportional to h3 (h is Planck' scostant) and R+ =[0 ,∞ ) .The solution f=f(x,v,t) is the particle number density for the gasparticles possessing quantum effects at time t andposition x with velocity v.In a dilute g…     

不含交叉项干扰且具有WVD聚集性的-时频分布之不存在性

证明了不含交叉项干扰且具有Wigner-Ville分布（WVD）聚集性的时频分布是不存在的,并且不含交叉项干扰而聚集性充分接近WVD聚集性的时频分布一般也不存在.     

Boltzmann Equations with Quantum Effects (2): Entropy Identity, Existence and Uniqueness of Spatial Decay Solutions

IntroductionAs in Zhang and Lu[1] ,we can write the modifiedBoltzmann equation for particles with quantumeffects in the absence of external force fields asfollows[2 5] :f(x,v,t)t +v .xf(x,v,t) =Qα(f) (x,v,t) ,(x,v,t)∈ R3 × R3 × R+ ,　 (BQE)whereα is proportional to h3 (h is Planck' sconstant) and R+ =[0 ,∞ ) .Let f =f (x,v,t)denote the particle number density for the gasparticles with quantum effects at time t andposition x with velocity v.The collision integralQα(f) in the BQ…