MAXENT APPROACH TO QUBITS

摘要

We consider the Hubbard-like Hamiltonian used in Physica B 352 (2004) 269-279, usingthe MaxEnt approach and a CSCO, as the set of relevant operators which, obviously,close a partial Lie algebra with the Hamiltonian. So, it is possible to define a positivedefinite metric on the space spanned by the mean values of the CSCO. Particularly,the selected operators represent the occupation number, the aligned and antialignedpairs per site, respectively. The interesting question to be examined here is whether theabove mentioned Hamiltonian have the property that the expectation values of a suitableoperator are indeed zero and one (or a constant) qubits, and zero and +1 and -1, i.e.,qutrits.