Consider a one-dimensional lsing model with n spins, at very low temperatures when almost all spins are aligned parallel to each other. there will be a few spin

Consider a one-dimensional lsing model with N spins, at very low temperatures when almost all spins are aligned parallel to each other. There will be a few spin flips with each lip costing an energy 2J. In a configuration with r spin flips, the energy of the system is E= - NJ+ 2r/ and the number of configuration is C,;r varies from 0 to N. The partition function is (b) Ikg sinh &,T