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Consider an ideal quantum gas of Fermi particles at a temperature T, a) Write the probability...

Consider an ideal quantum gas of Fermi particles at a temperature T,
a) Write the probability p(n) that there are n particles in a state of one particle given as a function of the average occupation number, <n>.
b) Find the root of the fluctuation to the average square in the occupation number of a single-particle state as a function of the occupation number
average <n>. Sketch the result

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