Topological insulator and the theta vacuum in a system without boundaries
Author(s)Chen, Kuang-Ting; Lee, Patrick A.
Topological insulator and the θ vacuum in a system without boundaries
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In this paper we address two questions concerning the effective action of a topological insulator in one- and three-dimensional space without boundaries, such as a torus. The first is whether a uniform theta term with theta=pi is generated for a strong topological insulator. The second is whether such a term has observable consequences in the bulk. The answers to both questions are positive, but the observability in three dimensions vanishes for infinite system size.
DepartmentMassachusetts Institute of Technology. Department of Physics
Physical Review B
American Physical Society
Chen, Kuang-Ting, and Patrick Lee. “Topological insulator and the θ vacuum in a system without boundaries.” Physical Review B 83 (2011). ©2011 American Physical Society.
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