Unique Signatures of Topological Phases in Two-Dimensional THz Spectroscopy
Abstract
We develop a microscopic theory for the two-dimensional (2D) spectroscopy of one-dimensional topological superconductors. We consider a ring geometry of an archetypal topological superconductor with periodic boundary conditions, bypassing energy-specific differences caused by topologically protected or trivial boundary modes that are hard to distinguish. We show numerically and analytically that the cross-peak structure of the 2D spectra carries unique signatures of the topological phases of the chain. Our work reveals how 2D spectroscopy can identify topological phases in bulk properties.
- Publication:
-
Physical Review Letters
- Pub Date:
- July 2022
- DOI:
- 10.1103/PhysRevLett.129.017401
- arXiv:
- arXiv:2202.00030
- Bibcode:
- 2022PhRvL.129a7401G
- Keywords:
-
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 16 pages, 10 figures