Dresden 2026 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 60: Critical Phenomena and Phase Transitions

DY 60.6: Vortrag

Freitag, 13. März 2026, 10:45–11:00, ZEU/0114

Out-of-equilibrium intertwining of Landau and time-crystalline orders via collective excitations — •Andras Szabo¹ and Rama Chitra² — ¹Max Planck Institute for Solid State Research, Stuttgart, Germany — ²ETH Zurich, Switzerland

The intertwining of multiple order parameters is a widespread phenomenon in equilibrium condensed matter systems, yet its exploration is often hindered by the complexity of real materials. Here, we present a controlled study of intertwined orders in a minimal and versatile driven-dissipative quantum-engineered platform. We consider a Bose-Einstein condensate at the intersection of two optical cavities, realizing two competing copies of a Z2 symmetry-breaking superradiant phase transition characterized by density wave orders. Using periodic drives that exploit dynamical symmetry reduction, we show that collective excitations can be harnessed to stabilize a variety of novel intertwined orders. Going beyond the conventional phenomenology involving Landau orders, we show the emergence of a larger class of out-of-equilibrium intertwined phases, including intertwining of purely time-crystalline orders, as well as between Landau and time crystal orders. These results should be observable in state of the art experimental setups

Keywords: intertwined orders; periodic driving; collective modes; time crystals; order parameters