Recent content by Muneer QAU

i was reading Random Phase Approximation and encouter with dielectric function ε(q,ω)= 1- v(q) ∏(q,ω) where v(q) is coulumb potential and ∏(q,ω) is density-density correlation function without coulumb interaction now i do not understand this dielctric...

thnxxx EmpaDoc :)

i learned that we have to consider quantum effects at low temperatures and classical effects at high temperatures but i do not the physics behind it can anyone explain it for me? thanks in advance :)

can anyone tell me why we use reciprocal lattice for understanding the diffraction of X rays from crystal? thanks in advance :)

how Energy time uncertainty principle account for the broadening of a level? thanks in advance

how to separate real and imaginary parts of a complex number?? i read that real and imaginary parts of a complex number can be separated by following equation 1/x+iη=P(1/x)-iδ(x) where P is principal of x i dunt understand this equation can any 1 explain this?

thanks kith :)

Thanks genneth for such a nice favour :)

Thanks xiyangxixia can you elaborate the term the scope of energy level?

thanks Genneth for this reply i am working on magnetotransport and have encounter with this term of Landau Level Broadening. i do not have idea of Anderson Localization please can you explain it simple term i read that landau level broadening occur due to impurity scattering how it occurs?

what is meant by landau level broadening in a magnetic field?

can anyone give me the info how can i get information about my system from density matrix? thanks