2026-06-29T16:38:54Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/428082023-08-27T00:54:21Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Viyuela García, Óscar
author
Rivas Vargas, Ángel
author
Martín-Delgado Alcántara, Miguel Ángel
2023-06-20T00:37:14Z
2023-06-20T00:37:14Z
2012-10-23
1098-0121
10.1103/PhysRevB.86.155140
https://hdl.handle.net/20.500.14352/42808
http://dx.doi.org/10.1103/PhysRevB.86.155140
https://journals.aps.org
We have studied the dynamical thermal effects on the protected end states of a topological insulator (TI) when it is considered as an open quantum system in interaction with a noisy environment at a certain temperature T . As a result, we find that protected end states in a TI become unstable and decay with time. Very remarkably, the interaction with the thermal environment (fermion-boson) respects chiral symmetry, which is the symmetry responsible for the protection (robustness) of the end states in this TI when it is isolated from the environment. Therefore, this mechanism makes end states unstable while preserving their protecting symmetry. Our results have immediate practical implications in recently proposed simulations of TIs using cold atoms in optical lattices. Accordingly, we have computed lifetimes of topological end states for these physical implementations that are useful to make those experiments realistic.
eng
Thermal instability of protected end states in a one-dimensional topological insulator
journal article
URL
https://docta.ucm.es/bitstreams/2d019c6e-b372-4f70-a5af-8a8478db6b27/download
File
MD5
90f61c4fb87e8a1d4463237a723dc202
299371
application/pdf
Martín Delgado Alcántara MÁ 15 LIBRE.pdf