Bonn 2025 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 11: Poster – Cold Atoms and Molecules, Matter Waves (joint session Q/A/MO)
A 11.14: Poster
Dienstag, 11. März 2025, 14:00–16:00, Tent
Topological signatures in the dynamical response of periodically driven Su-Schrieffer-Heeger model — Soumya Sasidharan1, •Souradeep Roy Choudhury2, Ahmet Levent Subaşi3, and Naveen Surendran1 — 1Indian Institute of Space Science and Technology, Valiamala, Thiruvananthapuram-695547, India — 2Goethe-Universität, Institut für Theoretische Physik, 60438 Frankfurt am Main, Germany — 3Department of Physics, Faculty of Science and Letters, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
We study the dynamics of periodically driven Su-Schrieffer-Heeger model subjected to a range of driving conditions. In the large-amplitude, high-frequency regime, we establish a remarkable correspondence between the bulk dynamical response and the topology of the Floquet phase. At half-filling, we compute the dynamical order parameter Q, which is the time-averaged occupancy of an initially filled band. We show that Q is quantitatively related to a topological invariant. Furthermore, we obtain topologically protected edge states in the nontrivial phases.
Keywords: Su-Schrieffer-Heeger Model; Floquet Dynamics; Topological Phase Transitions