New results for the XX model with boundaries
نویسنده
چکیده
In this paper, we study the XX model with particular non-diagonal boundaries. Using a fermionization technique for an extended version of this chain we are able to present a new operator which commutes with the extended and also the original Hamiltonian. It is a highly non-trivial conserved quantity in the spin-chain formalism which gives rise to an interesting combinatorial partition function. PACS numbers: 75.10.Jm, 05.50.+q, 11.25.Hf
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