Calculate the partition function of the system and obtain the average energy at a fixed temperature T.
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solve the question mentioning each step using statistical physics:
Consider a two spin system. The interaction energy of the system is given by the
formula E = −2kBT S1S2 where S1 = ±1 and S2 = ±1. Calculate the partition
function of the system and obtain the average energy at a fixed temperature T.
(Hint: The system can access four energy states.)
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