Ensemble Definition and 105 Threads

I am trying to make the connection from statistical mechanics to thermodynamics for the isothermal isobaric ensemble. Partition function = (sum of)exp(-BEj-gamma*Vj). I have followed T.L. Hill [Statistical Mechanics, p. 67] but can not understand how he justifies dE=(sum of)EdP, rather than...

Can someone explain to me about the van Leeuwen problem in classical stat physics and give me a complete step by step solutions to the problem. I am a graduate student doing MS. I am new to statistical mechanics. So please explian as one should explain it to an ms student. i have basic...

Hi I am just doing an undergraduate degree in physics and currently studying a course in the foundations of QM. The problem I want to solve is this: There is an ensemble in a state corresponding to vector (i, 2) A measurement of Sy (with the operator represented by the 2x2 pauli spin...

Hi, can someone please explain the exact notion of an ensemble to me please? In the canonical ensemble, how do ensembles exchange energy between one another? what is the significance of keeping the temperature fixed? thanks

I am taking a statictical mechanics course, and one thing bothers me. I am not sure when we should use the normal partition function (Z) and when the grand partition function (twisty Z). In particular, why can we not use grand partition function when we are considering the following system...