Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 13: Ultracold Matter (Bosons) I (joint session Q/A)

Q 13.8: Vortrag

Montag, 10. März 2025, 18:45–19:00, HS I PI

Driven-dissipative fermionized topological phases of strongly interacting bosons — •Arkajyoti Maity¹, Bimalendu Deb², and Jan-Michael Rost¹ — ¹Max Planck Institute for the Physics of Complex Systems, Dresden — ²Indian Association for the Cultivation of Science, Kolkata

We study the optical response of a one-dimensional array of strongly nonlinear optical microcavities with alternating tunnel transmissivities, mimicking the paradigmatic Su-Schriefer Heeger model. We show that the non-equilibrium steady state of the bosonic system contains clear signatures of fermionization when the intra-cavity Kerr non-linearity is stronger than both losses and inter-site tunnel coupling. Furthermore, changing the experimentally controllable parameters detuning and driving strength, in a topologically non-trivial phase, one can selectively excite either the bulk or edge modes or both modes, revealing interesting topological properties in a non-equilibrium system.

Keywords: Quantum Optics; Cavity QED; Topological Physics; Multiphoton physics