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DY: Fachverband Dynamik und Statistische Physik

DY 30: Nonequilibrium Quantum Systems I (joint session TT/DY)

DY 30.7: Vortrag

Mittwoch, 11. März 2026, 11:15–11:30, CHE/0091

Enhancing quantum metric using periodic driving — •Dhruv Tiwari, Roderich Moessner, and Johannes S. Hofmann — Max Planck Institute for the Physics of Complex Systems, Dresden, Germany

The advent of periodically driven systems has revolutionized modern condensed matter physics by offering two transformative opportunities. First, they enable the realization of nonequilibrium analogs of well-established equilibrium phases under highly tunable conditions. Second, they facilitate the emergence of novel phases with no equilibrium counterparts. In this work, we focus on the former, leveraging the tunable parameters of periodically driven systems to enhance the quantum metric in flat-band models. The quantum metric, a fundamental geometric property of the band structure, plays a crucial role in stabilizing various correlated phases. Here, we present results demonstrating that an appropriately chosen periodic drive can amplify the quantum metric and modify density-density interactions. Using both numerical and analytical techniques, we map out the phase diagram of the resulting model.

Keywords: Quantum metric; Flat band systems