Characterizing topological order in superconductors via entanglement.
We investigate/characterize topological order in superconducting systems using entanglement. Demonstrating/utilizing the directional dependence of the entanglement, results are shown for two-dimensional [Formula: see text] and [Formula: see text] +idxy spin-singlet superconductors, comparing the results to those for a spin-polarized px+ipy superconductor; we also discuss the topological properties of a one-dimensional spin-polarized p-wave superconductor threaded by a magnetic flux. In carrying out these investigations, we establish an efficient approach to investigate entanglement in superconductors or, more generally, in quadratic fermionic Hamiltonians with pairing interactions.
Department of Physics, University of Windsor, Windsor, Ontario N9B 3P4, Canada.
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Kim
D003198:Computer Simulation; D004553:Electric Conductivity; D004579:Electron Transport; D008956:Models, Chemical; D011789:Quantum Theory