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Drude weights in one-dimensional systems with a single defect
Kazuaki Takasan, Masaki Oshikawa, Haruki Watanabe
Ballistic transport of a quantum system can be characterized by Drude weight, which quantifies the response of the system to a uniform electric field in the infinitely long timesca…
Ground state degeneracy on torus in a family of toric code
Haruki Watanabe, Meng Cheng, Yohei Fuji
Topologically ordered phases in dimensions are generally characterized by three mutually-related features: fractionalized (anyonic) excitations, topological entanglement entr…
Classification of time-reversal symmetric topological superconducting phases for conventional pairing symmetries
Seishiro Ono, Ken Shiozaki, Haruki Watanabe
Based on a recently developed framework, we conduct classifications of time-reversal symmetric topological superconductors with conventional pairing symmetries. Our real-space appr…