PT-breaking threshold in spatially asymmetric Aubry-André and Harper models: Hidden symmetry and topological states
dc.contributor.author | Harter, Andrew K. | |
dc.contributor.author | Lee, Tony E. | |
dc.contributor.author | Joglekar, Yogesh N. | |
dc.contributor.department | Department of Physics, School of Science | en_US |
dc.date.accessioned | 2017-01-31T14:54:11Z | |
dc.date.available | 2017-01-31T14:54:11Z | |
dc.date.issued | 2016-06 | |
dc.description.abstract | Aubry-André-Harper lattice models, characterized by a reflection-asymmetric sinusoidally varying nearest-neighbor tunneling profile, are well known for their topological properties. We consider the fate of such models in the presence of balanced gain and loss potentials ±iγ located at reflection-symmetric sites. We predict that these models have a finite PT-breaking threshold only for specific locations of the gain-loss potential and uncover a hidden symmetry that is instrumental to the finite threshold strength. We also show that the topological edge states remain robust in the PT-symmetry-broken phase. Our predictions substantially broaden the possible experimental realizations of a PT-symmetric system. | en_US |
dc.eprint.version | Final published version | en_US |
dc.identifier.citation | Harter, A. K., Lee, T. E., & Joglekar, Y. N. (2016). PT-breaking threshold in spatially asymmetric Aubry-André and Harper models: Hidden symmetry and topological states. Physical Review A, 93(6), 062101. | en_US |
dc.identifier.uri | https://hdl.handle.net/1805/11886 | |
dc.language.iso | en | en_US |
dc.publisher | APS | en_US |
dc.relation.isversionof | 10.1103/PhysRevA.93.062101 | en_US |
dc.relation.journal | Physical Review A | en_US |
dc.rights | Publisher Policy | en_US |
dc.source | Publisher | en_US |
dc.title | PT-breaking threshold in spatially asymmetric Aubry-André and Harper models: Hidden symmetry and topological states | en_US |
dc.type | Article | en_US |