TY  - JOUR
A1  - Engelhardt, Georg
A1  - Benito, Mónica
A1  - Platero, Gloria
A1  - Brandes, Tobias
T1  - Topological instabilities in ac-driven bosonic systems
T2  - Physical Review Letters
N2  - Under nonequilibrium conditions, bosonic modes can become dynamically unstable with an exponentially growing occupation. On the other hand, topological band structures give rise to symmetry protected midgap states. In this Letter, we investigate the interplay of instability and topology. Thereby, we establish a general relation between topology and instability under ac driving. We apply our findings to create dynamical instabilities which are strongly localized at the boundaries of a finite-size system. As these localized instabilities are protected by symmetry, they can be considered as topological instabilities.
Y1  - 2023
UR  - https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/104291
UR  - https://nbn-resolving.org/urn:nbn:de:bvb:384-opus4-1042913
SN  - 0031-9007
VL  - 117
SP  - 045302
PB  - American Physical Society (APS)
CY  - College Park, MD
ER  -