Multiplicity function for N noninteracting spins

（重定向自Multiplicity function）

The multiplicity function for a two state paramagnet, W(n,N), is the number of spin states such that n of the N spins point in the z-direction. This function is given by the combinatoric function C(N,n). That is:

$W (n,N) = {N \choose n} = {{N!} \over {n!(N - n)!}}$

It is primarily used in introductory statistical mechanics and thermodynamics textbooks to explain the microscopic definition of entropy to students. If the spins are non-interacting, then the multiplicity function counts the number of states which have the same energy in an external magnetic field. By definition, the entropy S is then given by the natural logarithm of this number:

单词	Multiplicity function
释义	Multiplicity function 英语百科 Multiplicity function for N noninteracting spins （重定向自Multiplicity function） The multiplicity function for a two state paramagnet, W(n,N), is the number of spin states such that n of the N spins point in the z-direction. This function is given by the combinatoric function C(N,n). That is: $W (n,N) = {N \choose n} = {{N!} \over {n!(N - n)!}}$ It is primarily used in introductory statistical mechanics and thermodynamics textbooks to explain the microscopic definition of entropy to students. If the spins are non-interacting, then the multiplicity function counts the number of states which have the same energy in an external magnetic field. By definition, the entropy S is then given by the natural logarithm of this number:
随便看	restriction application的意思 restriction arc的意思 restriction area的意思 restrictionary的意思 restriction board的意思 Restriction,Caloric的意思 restriction characteristic的意思 restriction characteristics的意思 restriction chock的意思 restriction choke的意思 restriction clause的意思 restriction coefficient的意思 restriction condition的意思 restriction control的意思 restriction controller的意思 restriction crack的意思 restriction device的意思 Restriction digest的意思 restriction effect的意思 restriction efficiency的意思 restriction endonuclease的意思 restriction endonuclease banding的意思 restriction endonuclease from e. coli的意思 restriction endonuclease map的意思 Restriction Endonuclease Mapping的意思