The Hamiltonian matrix for a quantum mechanical system can be written as H=-gB (0 1 0,1 0 1,0 1 0), where g,b are positive constants. The system is in thermal equilibrium at temperature T, the average energy of the system is given by

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The Hamiltonian matrix for a quantum mechanical system can be written as H=-gB (0 1 0,1 0 1,0 1 0), where g,b are positive constants. The system is in thermal equilibrium at temperature T, the average energy of the system is given by

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