Abstract
The Kitaev chain model with a nearest neighbor interaction is solved exactly at the symmetry point and chemical potential in an open boundary condition. By applying two Jordan-Wigner transformations and a spin rotation, such a symmetric interacting model is mapped onto a noninteracting fermion model, which can be diagonalized exactly. The solutions include a topologically nontrivial phase at and a topologically trivial phase at . The two phases are related by dualities. Quantum phase transitions in the model are studied with the help of the exact solution.
- Received 25 October 2016
DOI:https://doi.org/10.1103/PhysRevLett.118.267701
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