Journal
PHYSICAL REVIEW LETTERS
Volume 118, Issue 26, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.118.267701
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Funding
- National Key Research and Development Program of China [2016YFA0300202]
- National Basic Research Program of China [2014CB921201/2014CB921203]
- NSFC [11374256/11674278]
- Fundamental Research Funds for the Central Universities in China
- University of Hong Kong's Grant Council [AoE/P-04/08]
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The Kitaev chain model with a nearest neighbor interaction U is solved exactly at the symmetry point Delta = t and chemical potential mu = 0 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 |U| < t and a topologically trivial phase at |U| > t. The two phases are related by dualities. Quantum phase transitions in the model are studied with the help of the exact solution.
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